diff --git a/.github/workflows/abtesting.yml b/.github/workflows/abtesting.yml
index b4ec5bef578..e7d25366464 100644
--- a/.github/workflows/abtesting.yml
+++ b/.github/workflows/abtesting.yml
@@ -45,7 +45,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -70,7 +69,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/auth.yml b/.github/workflows/auth.yml
index a8b04befda4..424ea3cada2 100644
--- a/.github/workflows/auth.yml
+++ b/.github/workflows/auth.yml
@@ -97,7 +97,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -117,7 +116,6 @@ jobs:
 
   #   env:
   #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-  #     signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
   #   runs-on: macos-14
   #   steps:
   #   - uses: actions/checkout@v4
diff --git a/.github/workflows/crashlytics.yml b/.github/workflows/crashlytics.yml
index 6d61284351a..60e103c672b 100644
--- a/.github/workflows/crashlytics.yml
+++ b/.github/workflows/crashlytics.yml
@@ -47,7 +47,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -77,7 +76,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/database.yml b/.github/workflows/database.yml
index 74a5bebe067..318ad0d9df5 100644
--- a/.github/workflows/database.yml
+++ b/.github/workflows/database.yml
@@ -73,7 +73,6 @@ jobs:
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/firestore.yml b/.github/workflows/firestore.yml
index dbb144924d8..05b609aa0f7 100644
--- a/.github/workflows/firestore.yml
+++ b/.github/workflows/firestore.yml
@@ -605,7 +605,6 @@ jobs:
   #   if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
   #   env:
   #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-  #     signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
   #   runs-on: macos-14
   #   needs: check
 
diff --git a/.github/workflows/functions.yml b/.github/workflows/functions.yml
index 658a78f1952..4cc466aa26e 100644
--- a/.github/workflows/functions.yml
+++ b/.github/workflows/functions.yml
@@ -56,7 +56,6 @@ jobs:
   #   if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
   #   env:
   #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-  #     signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
   #     LEGACY: true
   #   # TODO: Move to macos-14 and Xcode 15. The legacy quickstart uses material which doesn't build on Xcode 15.
   #   runs-on: macos-12
@@ -83,7 +82,6 @@ jobs:
   #   if: github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule'
   #   env:
   #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-  #     signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
   #     LEGACY: true
   #   # TODO: Move to macos-14 and Xcode 15. The legacy quickstart uses material which doesn't build on Xcode 15.
   #   runs-on: macos-12
diff --git a/.github/workflows/inappmessaging.yml b/.github/workflows/inappmessaging.yml
index edcf7b25b8d..408fb403960 100644
--- a/.github/workflows/inappmessaging.yml
+++ b/.github/workflows/inappmessaging.yml
@@ -90,7 +90,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
 
     steps:
diff --git a/.github/workflows/messaging.yml b/.github/workflows/messaging.yml
index 2dd09288c22..ce1d6a180e4 100644
--- a/.github/workflows/messaging.yml
+++ b/.github/workflows/messaging.yml
@@ -84,7 +84,6 @@ jobs:
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     strategy:
       matrix:
         include:
@@ -113,7 +112,6 @@ jobs:
     if: github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule'
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
index d788c81a968..5b81b71fba4 100644
--- a/.github/workflows/performance.yml
+++ b/.github/workflows/performance.yml
@@ -81,7 +81,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -104,7 +103,6 @@ jobs:
 
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/prerelease.yml b/.github/workflows/prerelease.yml
index 45cb46e10ab..5677aab2e88 100644
--- a/.github/workflows/prerelease.yml
+++ b/.github/workflows/prerelease.yml
@@ -220,7 +220,6 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
     runs-on: macos-15
     steps:
@@ -256,7 +255,6 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
     runs-on: macos-15
     steps:
@@ -286,10 +284,7 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -329,10 +324,7 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -363,10 +355,7 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -397,10 +386,7 @@ jobs:
     # needs: buildup_SpecsTesting_repo
     # env:
     #   plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-    #   signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     #   botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-    #   testing_repo_dir: "/tmp/test/"
-    #   testing_repo: "firebase-ios-sdk"
     #   LEGACY: true
     # # TODO: The functions quickstart uses Material which isn't supported by Xcode 15
     # runs-on: macos-12
@@ -437,10 +423,7 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -473,10 +456,7 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -509,7 +489,6 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
     runs-on: macos-15
     steps:
@@ -539,10 +518,7 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
       LEGACY: true
     runs-on: macos-15
     steps:
@@ -572,10 +548,7 @@ jobs:
     needs: buildup_SpecsTesting_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.PRERELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d29131a857e..0c45c2b786d 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -156,7 +156,6 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
     runs-on: macos-15
     steps:
@@ -192,7 +191,6 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
     runs-on: macos-15
     steps:
@@ -222,10 +220,7 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -265,10 +260,7 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -299,10 +291,7 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -333,10 +322,7 @@ jobs:
   #   needs: buildup_SpecsReleasing_repo
   #   env:
   #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-  #     signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
   #     botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-  #     testing_repo_dir: "/tmp/test/"
-  #     testing_repo: "firebase-ios-sdk"
   #     LEGACY: true
   #   runs-on: macos-12
   #   steps:
@@ -370,10 +356,7 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -406,10 +389,7 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -442,7 +422,6 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
     runs-on: macos-15
     steps:
@@ -472,10 +451,7 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
       LEGACY: true
     runs-on: macos-15
     steps:
@@ -505,10 +481,7 @@ jobs:
     needs: buildup_SpecsReleasing_repo
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       botaccess: ${{ secrets.RELEASE_TESTING_PAT }}
-      testing_repo_dir: "/tmp/test/"
-      testing_repo: "firebase-ios-sdk"
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/remoteconfig.yml b/.github/workflows/remoteconfig.yml
index 6b7ca4d68b3..906d0766aa3 100644
--- a/.github/workflows/remoteconfig.yml
+++ b/.github/workflows/remoteconfig.yml
@@ -88,7 +88,6 @@ jobs:
     if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
     runs-on: macos-15
     steps:
     - uses: actions/checkout@v4
@@ -109,7 +108,6 @@ jobs:
   #   if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
   #   env:
   #     plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-  #     signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
   #   runs-on: macos-14
   #   steps:
   #   - uses: actions/checkout@v4
diff --git a/.github/workflows/storage.yml b/.github/workflows/storage.yml
index 47d19b294c6..910f91f480c 100644
--- a/.github/workflows/storage.yml
+++ b/.github/workflows/storage.yml
@@ -90,7 +90,6 @@ jobs:
             xcode: Xcode_16.4
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       LEGACY: true
     runs-on: ${{ matrix.os }}
     steps:
@@ -111,7 +110,6 @@ jobs:
     if: github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule'
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       LEGACY: true
     runs-on: macos-15
     steps:
diff --git a/.github/workflows/zip.yml b/.github/workflows/zip.yml
index 10a02312ce0..429746ef071 100644
--- a/.github/workflows/zip.yml
+++ b/.github/workflows/zip.yml
@@ -107,7 +107,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "ABTesting"
     strategy:
       matrix:
@@ -166,7 +165,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK:  "Authentication"
     strategy:
       matrix:
@@ -217,7 +215,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "Config"
     strategy:
       matrix:
@@ -266,7 +263,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "Crashlytics"
     strategy:
       matrix:
@@ -338,7 +334,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "Database"
     strategy:
       matrix:
@@ -390,7 +385,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "Firestore"
     strategy:
       matrix:
@@ -478,7 +472,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "InAppMessaging"
     strategy:
       matrix:
@@ -531,7 +524,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "Messaging"
     strategy:
       matrix:
@@ -584,7 +576,6 @@ jobs:
     needs: package-head
     env:
       plist_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
-      signin_secret: ${{ secrets.GHASecretsGPGPassphrase1 }}
       SDK: "Storage"
     strategy:
       matrix: