diff --git a/.github/workflows/__analyze-ref-input.yml b/.github/workflows/__analyze-ref-input.yml
index 0fc55f2970..357fda7d0a 100644
--- a/.github/workflows/__analyze-ref-input.yml
+++ b/.github/workflows/__analyze-ref-input.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__autobuild-action.yml b/.github/workflows/__autobuild-action.yml
index eeed7f3dca..5e3a1a8625 100644
--- a/.github/workflows/__autobuild-action.yml
+++ b/.github/workflows/__autobuild-action.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__export-file-baseline-information.yml b/.github/workflows/__export-file-baseline-information.yml
index 01b0c3e224..e3bde8456e 100644
--- a/.github/workflows/__export-file-baseline-information.yml
+++ b/.github/workflows/__export-file-baseline-information.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__extractor-ram-threads.yml b/.github/workflows/__extractor-ram-threads.yml
index 2fa4dd308d..b700b7644c 100644
--- a/.github/workflows/__extractor-ram-threads.yml
+++ b/.github/workflows/__extractor-ram-threads.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__go-custom-queries.yml b/.github/workflows/__go-custom-queries.yml
index d785779eb0..a3f7209211 100644
--- a/.github/workflows/__go-custom-queries.yml
+++ b/.github/workflows/__go-custom-queries.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__go-tracing-autobuilder.yml b/.github/workflows/__go-tracing-autobuilder.yml
index b85cd6fadd..6ddb46b90a 100644
--- a/.github/workflows/__go-tracing-autobuilder.yml
+++ b/.github/workflows/__go-tracing-autobuilder.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__go-tracing-custom-build-steps.yml b/.github/workflows/__go-tracing-custom-build-steps.yml
index f89d77ca75..8f416388c7 100644
--- a/.github/workflows/__go-tracing-custom-build-steps.yml
+++ b/.github/workflows/__go-tracing-custom-build-steps.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__go-tracing-legacy-workflow.yml b/.github/workflows/__go-tracing-legacy-workflow.yml
index 2cc72c05ba..21ba978309 100644
--- a/.github/workflows/__go-tracing-legacy-workflow.yml
+++ b/.github/workflows/__go-tracing-legacy-workflow.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__init-with-registries.yml b/.github/workflows/__init-with-registries.yml
index cd0a1da52f..118440242c 100644
--- a/.github/workflows/__init-with-registries.yml
+++ b/.github/workflows/__init-with-registries.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__javascript-source-root.yml b/.github/workflows/__javascript-source-root.yml
index 9b54794c3b..369de3aa1c 100644
--- a/.github/workflows/__javascript-source-root.yml
+++ b/.github/workflows/__javascript-source-root.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__ml-powered-queries.yml b/.github/workflows/__ml-powered-queries.yml
index 848de5f94a..71335d7284 100644
--- a/.github/workflows/__ml-powered-queries.yml
+++ b/.github/workflows/__ml-powered-queries.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__multi-language-autodetect.yml b/.github/workflows/__multi-language-autodetect.yml
index 9b3cff5d50..44552b1c25 100644
--- a/.github/workflows/__multi-language-autodetect.yml
+++ b/.github/workflows/__multi-language-autodetect.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__packaging-codescanning-config-inputs-js.yml b/.github/workflows/__packaging-codescanning-config-inputs-js.yml
index 744ced18c3..aab56afa65 100644
--- a/.github/workflows/__packaging-codescanning-config-inputs-js.yml
+++ b/.github/workflows/__packaging-codescanning-config-inputs-js.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__packaging-config-inputs-js.yml b/.github/workflows/__packaging-config-inputs-js.yml
index dc4221656a..0963924765 100644
--- a/.github/workflows/__packaging-config-inputs-js.yml
+++ b/.github/workflows/__packaging-config-inputs-js.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__packaging-config-js.yml b/.github/workflows/__packaging-config-js.yml
index 47b1ecc738..ebb0b0f1eb 100644
--- a/.github/workflows/__packaging-config-js.yml
+++ b/.github/workflows/__packaging-config-js.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__packaging-inputs-js.yml b/.github/workflows/__packaging-inputs-js.yml
index a9bbac0759..13887ba5d7 100644
--- a/.github/workflows/__packaging-inputs-js.yml
+++ b/.github/workflows/__packaging-inputs-js.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__remote-config.yml b/.github/workflows/__remote-config.yml
index a6c5a4ec51..a9ed0eb2dd 100644
--- a/.github/workflows/__remote-config.yml
+++ b/.github/workflows/__remote-config.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__rubocop-multi-language.yml b/.github/workflows/__rubocop-multi-language.yml
index b06628b49d..a706b73751 100644
--- a/.github/workflows/__rubocop-multi-language.yml
+++ b/.github/workflows/__rubocop-multi-language.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__ruby.yml b/.github/workflows/__ruby.yml
index b74e93ff44..2df8f1f456 100644
--- a/.github/workflows/__ruby.yml
+++ b/.github/workflows/__ruby.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__split-workflow.yml b/.github/workflows/__split-workflow.yml
index 01e2a98381..036c912914 100644
--- a/.github/workflows/__split-workflow.yml
+++ b/.github/workflows/__split-workflow.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__submit-sarif-failure.yml b/.github/workflows/__submit-sarif-failure.yml
index 67d79c5c95..3d16460aa0 100644
--- a/.github/workflows/__submit-sarif-failure.yml
+++ b/.github/workflows/__submit-sarif-failure.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__swift-autobuild.yml b/.github/workflows/__swift-autobuild.yml
index 63c19736ad..f47aae05b6 100644
--- a/.github/workflows/__swift-autobuild.yml
+++ b/.github/workflows/__swift-autobuild.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__swift-custom-build.yml b/.github/workflows/__swift-custom-build.yml
index df78cd86be..dbade7b300 100644
--- a/.github/workflows/__swift-custom-build.yml
+++ b/.github/workflows/__swift-custom-build.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__test-autobuild-working-dir.yml b/.github/workflows/__test-autobuild-working-dir.yml
index a3721e6132..c6d13ab7b4 100644
--- a/.github/workflows/__test-autobuild-working-dir.yml
+++ b/.github/workflows/__test-autobuild-working-dir.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__test-local-codeql.yml b/.github/workflows/__test-local-codeql.yml
index fe83965094..6d9312ee2c 100644
--- a/.github/workflows/__test-local-codeql.yml
+++ b/.github/workflows/__test-local-codeql.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__test-proxy.yml b/.github/workflows/__test-proxy.yml
index 95327eddf7..82fcf7460c 100644
--- a/.github/workflows/__test-proxy.yml
+++ b/.github/workflows/__test-proxy.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__unset-environment.yml b/.github/workflows/__unset-environment.yml
index a499842291..dcba338e44 100644
--- a/.github/workflows/__unset-environment.yml
+++ b/.github/workflows/__unset-environment.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__upload-ref-sha-input.yml b/.github/workflows/__upload-ref-sha-input.yml
index 47a1865f8f..7c7a24f240 100644
--- a/.github/workflows/__upload-ref-sha-input.yml
+++ b/.github/workflows/__upload-ref-sha-input.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/__with-checkout-path.yml b/.github/workflows/__with-checkout-path.yml
index 4ea0a1bdbc..84c822374f 100644
--- a/.github/workflows/__with-checkout-path.yml
+++ b/.github/workflows/__with-checkout-path.yml
@@ -12,7 +12,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index a9c45b5445..ee7f36528c 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -2,9 +2,9 @@ name: "CodeQL action"
 
 on:
   push:
-    branches: [main, releases/v1, releases/v2]
+    branches: [main, releases/v2]
   pull_request:
-    branches: [main, releases/v1, releases/v2]
+    branches: [main, releases/v2]
     # Run checks on reopened draft PRs to support triggering PR checks on draft PRs that were opened
     # by other workflows.
     types: [opened, synchronize, reopened, ready_for_review]
diff --git a/.github/workflows/codescanning-config-cli.yml b/.github/workflows/codescanning-config-cli.yml
index 4cf405f022..272dc3a672 100644
--- a/.github/workflows/codescanning-config-cli.yml
+++ b/.github/workflows/codescanning-config-cli.yml
@@ -9,7 +9,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/debug-artifacts-failure.yml b/.github/workflows/debug-artifacts-failure.yml
index 8fc0102e61..0d60ca76ce 100644
--- a/.github/workflows/debug-artifacts-failure.yml
+++ b/.github/workflows/debug-artifacts-failure.yml
@@ -10,7 +10,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/debug-artifacts.yml b/.github/workflows/debug-artifacts.yml
index 836d7cad44..dd2aa90ff9 100644
--- a/.github/workflows/debug-artifacts.yml
+++ b/.github/workflows/debug-artifacts.yml
@@ -9,7 +9,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/expected-queries-runs.yml b/.github/workflows/expected-queries-runs.yml
index d74e90acbf..7b4b88fe83 100644
--- a/.github/workflows/expected-queries-runs.yml
+++ b/.github/workflows/expected-queries-runs.yml
@@ -4,7 +4,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index 8b36f4ed52..d59939c9bf 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -2,7 +2,7 @@ name: PR Checks
 
 on:
   push:
-    branches: [main, releases/v1, releases/v2]
+    branches: [main, releases/v2]
   pull_request:
     # Run checks on reopened draft PRs to support triggering PR checks on draft PRs that were opened
     # by other workflows.
@@ -70,23 +70,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
-      # Checks for any conflict markers created by git. This check is primarily intended to validate that
-      # any merge conflicts in the v2 -> v1 backport PR are fixed before the PR is merged.
-      - name: Check for merge conflicts
-        run: |
-          # Use `|| true` since grep returns exit code 1 if there are no matches, and we don't want
-          # this to fail the workflow.
-          FILES_WITH_CONFLICTS=$(grep --extended-regexp --ignore-case --line-number --recursive \
-            '^(<<<<<<<|>>>>>>>)' . || true)
-          if [[ "${FILES_WITH_CONFLICTS}" ]]; then
-            echo "Fail: Found merge conflict markers in the following files:"
-            echo ""
-            echo "${FILES_WITH_CONFLICTS}"
-            exit 1
-          else
-            echo "Success: Found no merge conflict markers."
-          fi
-
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
diff --git a/.github/workflows/python-deps.yml b/.github/workflows/python-deps.yml
index e8e0a8d317..a941fa8310 100644
--- a/.github/workflows/python-deps.yml
+++ b/.github/workflows/python-deps.yml
@@ -2,7 +2,7 @@ name: Test Python Package Installation on Linux and Mac
 
 on:
   push:
-    branches: [main, releases/v1, releases/v2]
+    branches: [main, releases/v2]
   pull_request:
     # Run checks on reopened draft PRs to support triggering PR checks on draft PRs that were opened
     # by other workflows.
diff --git a/.github/workflows/query-filters.yml b/.github/workflows/query-filters.yml
index 864a4fdbeb..c384a231dd 100644
--- a/.github/workflows/query-filters.yml
+++ b/.github/workflows/query-filters.yml
@@ -4,7 +4,6 @@ on:
   push:
     branches:
     - main
-    - releases/v1
     - releases/v2
   pull_request:
     types:
diff --git a/.github/workflows/script/update-required-checks.sh b/.github/workflows/script/update-required-checks.sh
index dfb1fc0f5a..f9f6a1195d 100755
--- a/.github/workflows/script/update-required-checks.sh
+++ b/.github/workflows/script/update-required-checks.sh
@@ -29,7 +29,7 @@ echo "$CHECKS" | jq
 
 echo "{\"contexts\": ${CHECKS}}" > checks.json
 
-for BRANCH in main releases/v2 releases/v1; do
+for BRANCH in main releases/v2; do
   echo "Updating $BRANCH"
   gh api --silent -X "PATCH" "repos/github/codeql-action/branches/$BRANCH/protection/required_status_checks" --input checks.json
 done
diff --git a/pr-checks/sync.py b/pr-checks/sync.py
index 74dd8c854c..219e7335cb 100644
--- a/pr-checks/sync.py
+++ b/pr-checks/sync.py
@@ -132,7 +132,7 @@ def writeHeader(checkStream):
             },
             'on': {
                 'push': {
-                    'branches': ['main', 'releases/v1', 'releases/v2']
+                    'branches': ['main', 'releases/v2']
                 },
                 'pull_request': {
                     'types': ["opened", "synchronize", "reopened", "ready_for_review"]