Fix dup Xcode

Author: ncooke3

.github/workflows/messaging.yml

@@ -50,8 +50,6 @@ jobs:
         mkdir FirebaseMessaging/Tests/IntegrationTests/Resources
         scripts/decrypt_gha_secret.sh scripts/gha-encrypted/messaging-sample-plist.gpg \
           FirebaseMessaging/Tests/IntegrationTests/Resources/GoogleService-Info.plist "$plist_secret"
-    - name: Xcode
-      run: sudo xcode-select -s /Applications/Xcode_15.2.app/Contents/Developer
     - name: BuildAndTest
       run: ([ -z $plist_secret ] || scripts/third_party/travis/retry.sh scripts/build.sh Messaging all)