GitHub Actions: don't add macOS artifacts to release

We now get a working macOS DMG for each CICD release via the webhook -
and the GitHub built .app.zip only worked on the latest macOS and was
near-unusable there.

We still make it available as an artifact of that macIS GitHub action in
case there is some value, but we no longer push it into the GitHub
release artifacts.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

.github/workflows/mac.yml

@@ -87,28 +87,3 @@ jobs:
       with:
         name: Subsurface.app
         path: build/Subsurface.app
-
-  publishRelease:
-    needs: desktopBuild
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout sources
-      uses: actions/checkout@v1
-      with:
-        fetch-depth: 1
-    - name: retrieve artifact
-      uses: actions/download-artifact@master
-      with:
-        name: Subsurface.app
-    - name: create zip file
-      run: |
-        zip -r Subsurface.app.zip Subsurface.app
-    - name: create CI release
-      if: github.event_name == 'push'
-      uses: ./.github/actions/release
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        GITHUB_REPO: ${{ github.repository }}
-        REF: ${{ github.ref }}
-        COMMIT: ${{ github.sha }}
-        BIN1: Subsurface.app.zip