chore: remove internal/librariangen following migration to librarian repo

.github/workflows/ci.yaml

@@ -5,18 +5,6 @@
   pull_request:
 name: ci
 jobs:
-  changes:
-    runs-on: ubuntu-latest
-    outputs:
-      should_run: ${{ steps.filter.outputs.should_run }}
-    steps:
-    - uses: actions/checkout@v4
-    - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36
-      id: filter
-      with:
-        filters: |
-          should_run:
-            - '!internal/librariangen/**'
   build:
     runs-on: ubuntu-22.04
     strategy:
@@ -71,8 +59,6 @@
           ./gradlew clean build publishToMavenLocal sourcesJar allJars
           popd
   build-java-21:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     name: "build(21) except self-service clients"
     # Support for Java 21 is available for all use cases except self-service clients.
     runs-on: ubuntu-22.04
@@ -106,8 +92,6 @@
         run: |
           bazelisk --batch test //test/integration/...
   build-java-25:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     name: "build(25) except self-service clients"
     # Support for Java 25 is available for all use cases except self-service clients.
     runs-on: ubuntu-22.04
@@ -142,8 +126,6 @@
         run: |
           bazelisk --batch test //test/integration/... --jvmopt=-Dcom.google.testing.junit.runner.shouldInstallTestSecurityManager=false
   build-java8-except-gapic-generator-java:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     name: "build(8) except for gapic-generator-java"
     runs-on: ubuntu-22.04
     steps:
@@ -190,8 +172,6 @@
           GOOGLE_SDK_JAVA_LOGGING: true
 
   build-java8-gapic-generator-java:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     name: "build(8) for gapic-generator-java"
     runs-on: ubuntu-22.04
     steps:
@@ -239,8 +219,6 @@
           popd
 
   lint:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
@@ -255,8 +233,6 @@
         run: mvn -B -ntp fmt:check
 
   compatibility:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
@@ -272,8 +248,6 @@
         run: mvn package clirr:check -DskipTests -Dfmt.skip
 
   build-java8-showcase:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     name: "build(8) for showcase"
     runs-on: ubuntu-22.04
     steps:
@@ -400,40 +374,37 @@
             --no-transfer-progress
 
   showcase-clirr:
-    needs: changes
-    if: ${{ github.base_ref != '' && needs.changes.outputs.should_run == 'true' }}
+    if: ${{ github.base_ref != '' }} # Only execute on pull_request trigger event
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout @ target branch
         uses: actions/checkout@v4
         with:
           ref: ${{ github.base_ref }}
       - uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: temurin
           cache: maven
       - name: Install sdk-platform-java and showcase to local maven repository
         run: |
           mvn install -B -ntp -T 1C -DskipTests
           cd java-showcase
           mvn install -B -ntp -T 1C -DskipTests
           SHOWCASE_CLIENT_VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
           echo "SHOWCASE_CLIENT_VERSION=$SHOWCASE_CLIENT_VERSION" >> "$GITHUB_ENV"
       - name: Checkout sdk-platform-java @ PR merge commit
         uses: actions/checkout@v3
       - name: Install sdk-platform-java @ PR merge commit
         run: mvn install -B -ntp -T 1C -DskipTests
         # Showcase golden test ensures that src changes are already reflected in the PR.
       - name: Clirr check
         working-directory: java-showcase
         run: |
           mvn versions:set -B -ntp -DnewVersion=local
           mvn clirr:check -B -ntp -Dclirr.skip=false -DcomparisonVersion=$SHOWCASE_CLIENT_VERSION
 
   gapic-generator-java-bom:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
@@ -451,8 +422,6 @@
         bom-path: gapic-generator-java-bom/pom.xml
 
   unmanaged_dependency_check:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
@@ -476,8 +445,6 @@
         bom-path: gapic-generator-java-bom/pom.xml
 
   dependency_analyzer_unit_test:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v4
@@ -491,4 +458,4 @@
     - name: Unit Tests
       run: |
         mvn test --batch-mode --no-transfer-progress
-      working-directory: java-shared-dependencies/dependency-analyzer
+      working-directory: java-shared-dependencies/dependency-analyzer

.github/workflows/dependency_compatibility_test.yaml

@@ -15,21 +15,7 @@ on:
         default: ''
 
 jobs:
-  changes:
-    runs-on: ubuntu-latest
-    outputs:
-      should_run: ${{ steps.filter.outputs.should_run }}
-    steps:
-    - uses: actions/checkout@v4
-    - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36
-      id: filter
-      with:
-        filters: |
-          should_run:
-            - '!internal/librariangen/**'
   dependency-compatibility-test:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -87,4 +73,4 @@ jobs:
           else
             ../.github/scripts/test_dependency_compatibility.sh -f ../dependencies.txt
           fi
-        working-directory: java-showcase
+        working-directory: java-showcase

.github/workflows/downstream.yaml

@@ -9,7 +9,6 @@ on:
       - library_generation/**
       - showcase/**
       - test/**
-      - internal/librariangen/**
 
 name: Downstream Check
 jobs:

.github/workflows/java_compatibility_check.yaml

@@ -17,21 +17,7 @@ on:
   pull_request:
 name: Java 8 compatibility check
 jobs:
-  changes:
-    runs-on: ubuntu-latest
-    outputs:
-      should_run: ${{ steps.filter.outputs.should_run }}
-    steps:
-    - uses: actions/checkout@v4
-    - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36
-      id: filter
-      with:
-        filters: |
-          should_run:
-            - '!internal/librariangen/**'
   java8-compatibility-check:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
@@ -57,4 +43,4 @@ jobs:
             exit 1
           fi
         done
-        echo "All class files are compatible with Java 8."
+        echo "All class files are compatible with Java 8."

.github/workflows/sonar.yaml

@@ -6,21 +6,7 @@ on:
   pull_request:
     types: [opened, synchronize, reopened]
 jobs:
-  changes:
-    runs-on: ubuntu-latest
-    outputs:
-      should_run: ${{ steps.filter.outputs.should_run }}
-    steps:
-    - uses: actions/checkout@v4
-    - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36
-      id: filter
-      with:
-        filters: |
-          should_run:
-            - '!internal/librariangen/**'
   build:
-    needs: changes
-    if: needs.changes.outputs.should_run == 'true'
     name: Build
     runs-on: ubuntu-22.04
     steps:
@@ -90,4 +76,4 @@ jobs:
               -Dsonar.projectKey=googleapis_gapic-generator-java_integration_tests \
               -Dsonar.organization=googleapis \
               -Dsonar.host.url=https://sonarcloud.io \
-              -Dsonar.projectName=java_showcase_integration_tests
+              -Dsonar.projectName=java_showcase_integration_tests