Merge branch 'gh-action-macos-cache'

Author: benma

.github/workflows/ci.yml

@@ -92,14 +92,6 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: recursive
-      - name: Enable caching
-        uses: actions/cache@v2
-        with:
-          # The key version is just an incremental number.
-          # Bump it every time there are changes in CI scripts.
-          key: ${{runner.os}}-qt-osx-v2
-          path: |
-            ~/Library/Caches/Homebrew
       - name: Install Go
         uses: actions/setup-go@v2
         with: