Remove unused workflow (#5645)

.github/workflows/release-gradle-plugins.yml

@@ -1,59 +0,0 @@
-# Releases a new minor / major version of gradle plugins from a release branch
-name: Release Gradle Plugins
-on:
-  workflow_dispatch:
-    inputs:
-      release-branch-name:
-        description: The release branch to use, e.g. v1.9.x
-        required: true
-      version:
-        # TODO (trask) this is redundant
-        description: The version of the release, e.g. 1.9.0 (without the "v" prefix)
-        required: true
-
-jobs:
-  test:
-    uses: ./.github/workflows/reusable-test.yml
-
-  # testLatestDeps is intentionally not included in the release workflows
-  # because any time a new library version is released to maven central
-  # it can fail due to test code incompatibility with the new library version,
-  # or due to slight changes in emitted telemetry
-
-  smoke-test:
-    uses: ./.github/workflows/reusable-smoke-test.yml
-
-  # muzzle is intentionally not included in the release workflows
-  # because any time a new library version is released to maven central it can fail,
-  # and this is not a reason to hold up the release
-
-  examples:
-    uses: ./.github/workflows/reusable-examples.yml
-
-  release:
-    needs: [ test, smoke-test, examples ]
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ github.event.inputs.release-branch-name }}
-
-      - name: Set up JDK for running Gradle
-        uses: actions/setup-java@v2
-        with:
-          distribution: temurin
-          java-version: 17
-
-      - name: Build and publish gradle plugins
-        uses: gradle/gradle-build-action@v2
-        env:
-          SONATYPE_USER: ${{ secrets.SONATYPE_USER }}
-          SONATYPE_KEY: ${{ secrets.SONATYPE_KEY }}
-          GRADLE_PUBLISH_KEY: ${{ secrets.GRADLE_PUBLISH_KEY }}
-          GRADLE_PUBLISH_SECRET: ${{ secrets.GRADLE_PUBLISH_SECRET }}
-          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
-          GPG_PASSWORD: ${{ secrets.GPG_PASSWORD }}
-        with:
-          # Don't use publishToSonatype since we don't want to publish the marker artifact
-          arguments: build publishPlugins publishPluginMavenPublicationToSonatypeRepository closeAndReleaseSonatypeStagingRepository
-          build-root-directory: gradle-plugins