Adds Gemini CLI to Github Actions (#2718)

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I have added sample code updates to the [changelog].
- [x] I updated/added relevant documentation (doc comments with `///`).

.github/workflows/main.yml

@@ -36,31 +36,3 @@ jobs:
         with:
           channel: ${{ matrix.flutter_version }}
       - run: flutter pub get && dart tool/ci_script.dart
-
-  # android-build:
-  #   runs-on: ubuntu-latest
-  #   if: github.repository == 'flutter/samples'
-  #   steps:
-  #     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-  #     - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165
-  #       with:
-  #         distribution: 'zulu'
-  #         java-version: '17'
-  #     - uses: subosito/flutter-action@e938fdf56512cc96ef2f93601a5a40bde3801046
-  #       with:
-  #         channel: stable
-  #     - run: ./tool/android_ci_script.sh
-
-  # ios-build:
-  #   runs-on: macos-latest
-  #   if: github.repository == 'flutter/samples'
-  #   steps:
-  #     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-  #     - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165
-  #       with:
-  #         distribution: 'zulu'
-  #         java-version: '17'
-  #     - uses: subosito/flutter-action@e938fdf56512cc96ef2f93601a5a40bde3801046
-  #       with:
-  #         channel: stable
-  #     - run: ./tool/ios_ci_script.sh