simply github workflow since we migrate most of CI steps to prow (#4299)

.github/workflows/nightly-builds.yml

@@ -26,28 +26,14 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Downloading go dependencies
-        run: go mod vendor
-
-      - name: Build
-        run: make all
-
-      - name: Make OpenAPI Spec
-        run: make openapi
-
       - name: Build and push docker images
         env:
           DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
           DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
         run: |
           echo ${{ secrets.DOCKER_PASSWORD }} | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
-
-          if [[ $? == 0 ]]; then
-            tag=nightly-$(date '+%Y%m%d')
-            REPO=kubespheredev TAG=${tag} make container-push
-          else
-            exit -1
-          fi
+          tag=nightly-$(date '+%Y%m%d')
+          REPO=kubespheredev TAG=${tag} make container-push
 
       - name: slack
         uses: 8398a7/action-slack@v3