Delete dmg-release.yml (#1655)

Summary:
No longer necessary as this is now taken care of by the new unified release Action.

Pull Request resolved: https://github.com/facebook/flipper/pull/1655

Test Plan: Next release, I'm afraid.

Reviewed By: nikoant

Differential Revision: D24782070

Pulled By: passy

fbshipit-source-id: 36ce0db814ad60fa04e4ed81b3657323bc5c983b

.github/workflows/dmg-release.yml

@@ -1,46 +0,0 @@
-name: Publish DMG App On Release
-
-on:
-  release:
-    types: [created]
-
-jobs:
-  build:
-
-    runs-on: macos-latest
-    env:
-      desktop-directory: ./desktop
-
-    steps:
-    - uses: actions/checkout@v1
-    - uses: actions/setup-node@v1
-      with:
-        node-version: '12.x'
-    - name: Install
-      run: yarn
-      working-directory: ${{env.desktop-directory}}
-    - name: Build
-      run: yarn build --mac --mac-dmg
-      working-directory: ${{env.desktop-directory}}
-    - name: Upload
-      uses: actions/upload-artifact@v1
-      with:
-        name: 'Flipper-mac.dmg'
-        path: 'dist/Flipper-mac.dmg'
-
-  publish:
-    runs-on: ubuntu-latest
-    needs: build
-
-    steps:
-    - name: Download
-      uses: actions/download-artifact@v1
-      with:
-        name: 'Flipper-mac.dmg'
-        path: 'Flipper-mac.dmg'
-    - name: GitHub Upload Release Artifacts
-      uses: Roang-zero1/github-upload-release-artifacts-action@v2.1.0
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        args: '*.dmg'