Run CI with default GHA Xcode version (#8020)

Author: paulb777

.github/workflows/abtesting.yml

@@ -35,8 +35,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests
@@ -51,8 +49,6 @@ jobs:
         target: [tvOS, macOS, catalyst]
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: Unit Tests

.github/workflows/appdistribution.yml

@@ -35,8 +35,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests

.github/workflows/core-diagnostics.yml

@@ -35,8 +35,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests

.github/workflows/core.yml

@@ -34,8 +34,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests
@@ -50,8 +48,6 @@ jobs:
         target: [tvOS, macOS, catalyst]
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: Unit Tests

.github/workflows/crashlytics.yml

@@ -37,8 +37,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests
@@ -53,8 +51,6 @@ jobs:
         target: [tvOS, macOS, catalyst]
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: Unit Tests

.github/workflows/database.yml

@@ -47,8 +47,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests
@@ -63,8 +61,6 @@ jobs:
         target: [tvOS, macOS, catalyst]
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: Unit Tests

.github/workflows/dynamiclinks.yml

@@ -30,8 +30,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests

.github/workflows/firestore.yml

@@ -199,8 +199,6 @@ jobs:
     needs: check
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Build Test
@@ -217,8 +215,6 @@ jobs:
         target: [tvOS, macOS, catalyst]
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: Build Test

.github/workflows/inappmessaging.yml

@@ -51,8 +51,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests

.github/workflows/installations.yml

@@ -44,8 +44,6 @@ jobs:
     runs-on: macOS-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: iOS Unit Tests
@@ -60,8 +58,6 @@ jobs:
         target: [tvOS, macOS, catalyst]
     steps:
     - uses: actions/checkout@v2
-    - name: Xcode 12
-      run: sudo xcode-select -s /Applications/Xcode_12.app/Contents/Developer
     - name: Initialize xcodebuild
       run: xcodebuild -list
     - name: Unit Tests