Don't push to marketplace on release

I don't have a marketplace account (yet?) so publishPlugin always
fails.

.github/workflows/release.yml

@@ -8,30 +8,6 @@ on:
 
 jobs:
 
-  # Prepare and publish the plugin to the Marketplace repository
-  release:
-    name: Publish Plugin
-    runs-on: ubuntu-latest
-    steps:
-
-      # Setup Java 1.8 environment for the next steps
-      - name: Setup Java
-        uses: actions/setup-java@v1
-        with:
-          java-version: 1.8
-
-      # Check out current repository
-      - name: Fetch Sources
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.event.release.tag_name }}
-
-      # Publish the plugin to the Marketplace
-      - name: Publish Plugin
-        env:
-          PUBLISH_TOKEN: ${{ secrets.PUBLISH_TOKEN }}
-        run: ./gradlew publishPlugin
-
   # Patch changelog, commit and push to the current repository
   changelog:
     name: Update Changelog