[Setup] Remove AdSupport from the list of libraries linked by default

Summary:
Many apps don't need AdSupport, especially not when people are making a sample app to learn React. Apps that do want it can link it in like any other library.

Fixes #1303, see the discussion there.
Closes #1305
Github Author: James Ide <[email protected]>

Test Plan: Imported from GitHub, without a `Test Plan:` line.

Author: ide

Examples/SampleApp/SampleApp.xcodeproj/project.pbxproj

@@ -9,7 +9,6 @@
 /* Begin PBXBuildFile section */
 		008F07F31AC5B25A0029DE68 /* main.jsbundle in Resources */ = {isa = PBXBuildFile; fileRef = 008F07F21AC5B25A0029DE68 /* main.jsbundle */; };
 		00C302E51ABCBA2D00DB3ED1 /* libRCTActionSheet.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 00C302AC1ABCB8CE00DB3ED1 /* libRCTActionSheet.a */; };
-		00C302E61ABCBA2D00DB3ED1 /* libRCTAdSupport.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 00C302B41ABCB8E700DB3ED1 /* libRCTAdSupport.a */; };
 		00C302E71ABCBA2D00DB3ED1 /* libRCTGeolocation.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 00C302BA1ABCB90400DB3ED1 /* libRCTGeolocation.a */; };
 		00C302E81ABCBA2D00DB3ED1 /* libRCTImage.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 00C302C01ABCB91800DB3ED1 /* libRCTImage.a */; };
 		00C302E91ABCBA2D00DB3ED1 /* libRCTNetwork.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 00C302DC1ABCB9D200DB3ED1 /* libRCTNetwork.a */; };
@@ -34,13 +33,6 @@
 			remoteGlobalIDString = 134814201AA4EA6300B7C361;
 			remoteInfo = RCTActionSheet;
 		};
-		00C302B31ABCB8E700DB3ED1 /* PBXContainerItemProxy */ = {
-			isa = PBXContainerItemProxy;
-			containerPortal = 00C302AF1ABCB8E700DB3ED1 /* RCTAdSupport.xcodeproj */;
-			proxyType = 2;
-			remoteGlobalIDString = 832C81801AAF6DEF007FA2F7;
-			remoteInfo = RCTAdSupport;
-		};
 		00C302B91ABCB90400DB3ED1 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 00C302B51ABCB90400DB3ED1 /* RCTGeolocation.xcodeproj */;
@@ -116,7 +108,6 @@
 /* Begin PBXFileReference section */
 		008F07F21AC5B25A0029DE68 /* main.jsbundle */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = main.jsbundle; path = iOS/main.jsbundle; sourceTree = "<group>"; };
 		00C302A71ABCB8CE00DB3ED1 /* RCTActionSheet.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTActionSheet.xcodeproj; path = ../../Libraries/ActionSheetIOS/RCTActionSheet.xcodeproj; sourceTree = "<group>"; };
-		00C302AF1ABCB8E700DB3ED1 /* RCTAdSupport.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTAdSupport.xcodeproj; path = ../../Libraries/AdSupport/RCTAdSupport.xcodeproj; sourceTree = "<group>"; };
 		00C302B51ABCB90400DB3ED1 /* RCTGeolocation.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTGeolocation.xcodeproj; path = ../../Libraries/Geolocation/RCTGeolocation.xcodeproj; sourceTree = "<group>"; };
 		00C302BB1ABCB91800DB3ED1 /* RCTImage.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTImage.xcodeproj; path = ../../Libraries/Image/RCTImage.xcodeproj; sourceTree = "<group>"; };
 		00C302D31ABCB9D200DB3ED1 /* RCTNetwork.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTNetwork.xcodeproj; path = ../../Libraries/Network/RCTNetwork.xcodeproj; sourceTree = "<group>"; };
@@ -152,7 +143,6 @@
 			files = (
 				146834051AC3E58100842450 /* libReact.a in Frameworks */,
 				00C302E51ABCBA2D00DB3ED1 /* libRCTActionSheet.a in Frameworks */,
-				00C302E61ABCBA2D00DB3ED1 /* libRCTAdSupport.a in Frameworks */,
 				00C302E71ABCBA2D00DB3ED1 /* libRCTGeolocation.a in Frameworks */,
 				00C302E81ABCBA2D00DB3ED1 /* libRCTImage.a in Frameworks */,
 				133E29F31AD74F7200F7D852 /* libRCTLinking.a in Frameworks */,
@@ -175,14 +165,6 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
-		00C302B01ABCB8E700DB3ED1 /* Products */ = {
-			isa = PBXGroup;
-			children = (
-				00C302B41ABCB8E700DB3ED1 /* libRCTAdSupport.a */,
-			);
-			name = Products;
-			sourceTree = "<group>";
-		};
 		00C302B61ABCB90400DB3ED1 /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -283,7 +265,6 @@
 			children = (
 				146833FF1AC3E56700842450 /* React.xcodeproj */,
 				00C302A71ABCB8CE00DB3ED1 /* RCTActionSheet.xcodeproj */,
-				00C302AF1ABCB8E700DB3ED1 /* RCTAdSupport.xcodeproj */,
 				00C302B51ABCB90400DB3ED1 /* RCTGeolocation.xcodeproj */,
 				00C302BB1ABCB91800DB3ED1 /* RCTImage.xcodeproj */,
 				78C398B01ACF4ADC00677621 /* RCTLinking.xcodeproj */,
@@ -394,10 +375,6 @@
 					ProductGroup = 00C302A81ABCB8CE00DB3ED1 /* Products */;
 					ProjectRef = 00C302A71ABCB8CE00DB3ED1 /* RCTActionSheet.xcodeproj */;
 				},
-				{
-					ProductGroup = 00C302B01ABCB8E700DB3ED1 /* Products */;
-					ProjectRef = 00C302AF1ABCB8E700DB3ED1 /* RCTAdSupport.xcodeproj */;
-				},
 				{
 					ProductGroup = 00C302B61ABCB90400DB3ED1 /* Products */;
 					ProjectRef = 00C302B51ABCB90400DB3ED1 /* RCTGeolocation.xcodeproj */;
@@ -451,13 +428,6 @@
 			remoteRef = 00C302AB1ABCB8CE00DB3ED1 /* PBXContainerItemProxy */;
 			sourceTree = BUILT_PRODUCTS_DIR;
 		};
-		00C302B41ABCB8E700DB3ED1 /* libRCTAdSupport.a */ = {
-			isa = PBXReferenceProxy;
-			fileType = archive.ar;
-			path = libRCTAdSupport.a;
-			remoteRef = 00C302B31ABCB8E700DB3ED1 /* PBXContainerItemProxy */;
-			sourceTree = BUILT_PRODUCTS_DIR;
-		};
 		00C302BA1ABCB90400DB3ED1 /* libRCTGeolocation.a */ = {
 			isa = PBXReferenceProxy;
 			fileType = archive.ar;