removing old workflow

.github/workflows/gradle.yml

@@ -1,23 +0,0 @@
-# This workflow will build a Java project with Gradle
-# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
-
-name: Android app with Gradle
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout the code
-        uses: actions/checkout@v2
-      - name: Grant execute permission for gradlew
-        run: chmod +x gradlew
-      - name: Build the app
-        run: ./gradlew build
-