feat: remove Gitea registry login step from build workflow

.gitea/workflows/build.yml

@@ -50,9 +50,6 @@ jobs:
         if: ${{ secrets.DOCKERHUB_USERNAME != '' && secrets.DOCKERHUB_TOKEN != '' }}
         run: echo "${{ secrets.DOCKERHUB_TOKEN }}" | docker login docker.io -u "${{ secrets.DOCKERHUB_USERNAME }}" --password-stdin
      
-      - name: Log in to Gitea registry
-        run: echo "${REGISTRY_PASSWORD}" | docker login "${REGISTRY}" -u "${REGISTRY_USERNAME}" --password-stdin
-
       - name: Build all-in-one image
         run: |
           docker build -t ${IMAGE_NAME}:latest" -f Dockerfile.allinone .