Disable GitHub Actions cache

.github/workflows/build.yml

@@ -14,16 +14,6 @@ jobs:
         java: [8, 11]    
     steps:
     - uses: actions/checkout@v2
-    - name: Cache
-      uses: actions/cache@v2
-      env:
-        cache-name: cache-sbt-libs
-      with:
-        path: |
-          ~/.ivy2/cache
-          ~/.sbt
-          ~/.coursier
-        key: build-${{ env.cache-name }}-${{ hashFiles('build.sbt') }}
     - name: Set up JDK
       uses: actions/setup-java@v1
       with: