Remove most Firestore builds from Travis (#4843)

Remove:
  * pod-lib-lint
  * cmake builds
  * Xcode 11 xcodebuild
  * Xcode 11 sanitizers

What remains:
  * Xcode 11 quickstart
  * Xcode 10.3 xcodebuild

Author: wilhuff

.travis.yml

@@ -460,15 +460,6 @@ jobs:
         - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseCoreDiagnosticsInterop.podspec
         - travis_retry ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseInAppMessaging.podspec
 
-    - stage: test
-      env:
-        - PROJECT=Firestore METHOD=pod-lib-lint
-      script:
-        # Eliminate the one warning from BoringSSL when CocoaPods 1.6.0 is available.
-        # The travis_wait is necessary because the command takes more than 10 minutes.
-        # Some of the Firestore dependencies fail to analyze.
-        - travis_wait 30 ./scripts/if_changed.sh ./scripts/pod_lib_lint.rb FirebaseFirestore.podspec --platforms=ios --allow-warnings --no-subspecs --no-analyze
-
     # pod lib lint to check build and warnings for static library build - only on cron jobs
     - stage: test
       if: type = cron
@@ -478,15 +469,6 @@ jobs:
         - travis_retry ./scripts/pod_lib_lint.rb FirebaseInAppMessaging.podspec --use-libraries
         - travis_retry ./scripts/pod_lib_lint.rb FirebaseInAppMessaging.podspec --use-modular-headers
 
-    - stage: test
-      if: type = cron
-      env:
-        - PROJECT=Firestore METHOD=pod-lib-lint
-      script:
-        # TBD - non-portable path warnings
-        # The travis_wait is necessary because the command takes more than 10 minutes.
-        - travis_wait 45 ./scripts/pod_lib_lint.rb FirebaseFirestore.podspec --use-libraries --allow-warnings --no-subspecs --no-analyze
-
     - stage: test
       env:
         - PROJECT=GoogleDataTransport METHOD=pod-lib-lint
@@ -542,80 +524,6 @@ jobs:
       script:
         - travis_retry ./scripts/build.sh $PROJECT $PLATFORM $METHOD
 
-    # Alternative platforms
-    - stage: test
-      env:
-        - PROJECT=Firestore PLATFORM=macOS METHOD=cmake
-      before_install:
-        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-      script:
-        - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM $METHOD
-
-    # Test Firestore on Xcode 8 to use old llvm to ensure C++ portability.
-    # Disabled while we resolve issues discussed in #4084 and #4085
-    # - stage: test
-    #   osx_image: xcode8.3
-    #   env:
-    #     - PROJECT=Firestore PLATFORM=iOS METHOD=xcodebuild XCODE_VERSION=8.3.3
-    #   before_install:
-    #     - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-    #   script:
-    #     - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM $METHOD
-
-    - stage: test
-      env:
-        - PROJECT=Firestore PLATFORM=macOS METHOD=xcodebuild
-      before_install:
-        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-      script:
-        - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM
-
-    - stage: test
-      env:
-        - PROJECT=Firestore PLATFORM=tvOS METHOD=xcodebuild
-      before_install:
-        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-      script:
-        - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM
-
-    # Firestore sanitizers
-
-    - stage:
-      env:
-        - PROJECT=Firestore PLATFORM=iOS METHOD=xcodebuild SANITIZERS=asan
-      before_install:
-        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-      script:
-        - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM $METHOD
-
-    - stage: test
-      env:
-        - PROJECT=Firestore PLATFORM=iOS METHOD=xcodebuild SANITIZERS=tsan
-      before_install:
-        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-      script:
-        - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM $METHOD
-
-    # TODO(varconst): enable UBSan in xcodebuild. Right now if fails during
-    # linkage (it works if enabled together with ASan, but it's supposed to be
-    # usable on its own, too).
-
-    - stage: test
-      env:
-        - PROJECT=Firestore PLATFORM=macOS METHOD=cmake SANITIZERS=asan
-      before_install:
-        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-      script:
-        - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM $METHOD
-
-    - stage: test
-      env:
-        - PROJECT=Firestore PLATFORM=macOS METHOD=cmake SANITIZERS=tsan
-      before_install:
-        - ./scripts/if_changed.sh ./scripts/install_prereqs.sh
-      script:
-        - travis_retry ./scripts/if_changed.sh ./scripts/build.sh $PROJECT $PLATFORM $METHOD
-
     # Validate Cocoapods configurations
     # This may take long time, so we would like to run it only once all other tests pass
     # Validate Cocoapods 1.7.0 compatibility
@@ -713,22 +621,9 @@ jobs:
         # The travis_wait is necessary because fuzzing runs for 40 minutes.
         - travis_wait 45 ./scripts/fuzzing_ci.sh
 
-    # TODO(varconst): UBSan for CMake. UBSan failures are non-fatal by default,
-    # need to make them fatal for the purposes of the test run.
-
-  # TODO(varconst): disallow sanitizers to fail once we fix all existing issues.
-    - env:
-      - PROJECT=Firestore PLATFORM=macOS METHOD=cmake SANITIZERS=tsan
-    - env:
-      - PROJECT=Firestore PLATFORM=iOS METHOD=xcodebuild SANITIZERS=tsan
     - env:
       - PROJECT=GoogleDataTransportIntegrationTest PLATFORM=iOS METHOD=xcodebuild
 
-  # TODO(varconst): enable if it's possible to make this flag work on build
-  # stages. It's supposed to avoid waiting for jobs that are allowed to fail
-  # before reporting the results.
-  # fast_finish: true
-
 branches:
   only:
     - master