Remove auto generated backup file workflow file

.github/workflows/android_workflow.yml.bak

@@ -1,43 +0,0 @@
-name: Android CI
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
-
-jobs:
-  build:
-    name: Build apk
-    runs-on: ubuntu-latest
-    steps:
-      - name: Cancel previous runs
-        uses: styfle/cancel-workflow-action@0.5.0
-        with:
-          access_token: ${{ github.token }}
-
-      - name: Clone repo
-        uses: actions/checkout@v2
-
-      - name: Set up JDK 11
-        uses: actions/setup-java@v1
-        with:
-          java-version: 11
-
-      - name: Grant execute permission for gradlew
-        run: chmod +x gradlew
-
-      - name: Build debug apk
-        uses: eskatos/gradle-command-action@v1
-        with:
-          arguments: assembleDebug
-          distributions-cache-enabled: true
-          dependencies-cache-enabled: true
-          configuration-cache-enabled: true
-
-      - name: Upload artifact
-        uses: actions/upload-artifact@v2
-        if: ${{ !github.head_ref }}
-        with:
-          name: apk-debug
-          path: app/build/outputs/apk/debug