ci: remove updating server for stable releases

.github/workflows/docker.yml

@@ -62,10 +62,3 @@ jobs:
           labels: stable
           cache-from: type=gha
           cache-to: type=gha,mode=max
-      - name: Push update to server
-        if: steps.build.outcome == 'success'
-        uses: indiesdev/curl@v1.1
-        with:
-          url: ${{ secrets.AUTO_UPDATE_URL }}
-          method: POST
-          timeout: 600000