Remove 'clear cache' CI flow (#2563)

It never worked as expected and keeps failing

.github/workflows/clear-cache.yml

@@ -1,34 +0,0 @@
-name: Clear Gradle Cache
-
-on:
-  workflow_dispatch:
-  schedule:
-    # Every nights at 4
-    - cron: "0 4 * * *"
-
-# Enrich gradle.properties for CI/CD
-env:
-  GRADLE_OPTS: -Dorg.gradle.jvmargs="-Xmx8g -Dfile.encoding=UTF-8 -XX:+HeapDumpOnOutOfMemoryError" -Dkotlin.incremental=false -XX:+UseParallelGC
-  CI_GRADLE_ARG_PROPERTIES: --stacktrace -PpreDexEnable=false --max-workers 8 --warn
-
-jobs:
-  tests:
-    name: Clear Gradle cache
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: ⏬ Checkout with LFS
-        uses: nschloe/action-cached-lfs-checkout@v1.2.2
-      - name: ☕️ Use JDK 17
-        uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin' # See 'Supported distributions' for available options
-          java-version: '17'
-      - name: Configure gradle
-        uses: gradle/actions/setup-gradle@v3
-        with:
-          gradle-home-cache-cleanup: true
-
-        # This should build the project and run the tests, and the build files will be used to diff with the cache
-      - name: ⚙️ Build the GPlay debug variant, run unit tests
-        run: ./gradlew :app:assembleGplayDebug test $CI_GRADLE_ARG_PROPERTIES