Added gradle now uses the java version it runs on.

.github/workflows/build_validator.yml

@@ -35,7 +35,5 @@ jobs:
       run: chmod +x ./gradlew
     - name: Generate SourceCode with Gradle
       run: ./gradlew generateGithubSource
-    - name: Setting Java Version
-      run: echo pcJavaVersion=${{matrix.jdk}} > ./local.properties
     - name: Build with Gradle
       run: ./gradlew build