[skip ci] Remove CI-specific Gradle config

Newer versions of gradle-build-action allows the daemon to persist across build steps

.github/workflows/build_pull_request.yml

@@ -29,11 +29,6 @@ jobs:
           java-version: 11
           distribution: adopt
 
-      - name: Copy CI gradle.properties
-        run: |
-          mkdir -p ~/.gradle
-          cp .github/runner-files/ci-gradle.properties ~/.gradle/gradle.properties
-
       - name: Build app and run unit tests
         uses: gradle/gradle-command-action@v2
         with: