ci: remove message_relayer Github Action (#914)

.github/workflows/docker.yaml

@@ -48,27 +48,6 @@ jobs:
         tags: scrolltech/gas-oracle:${{github.ref_name}}
         # cache-from: type=gha,scope=${{ github.workflow }}
         # cache-to: type=gha,scope=${{ github.workflow }}
-  msg_relayer:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Checkout code
-      uses: actions/checkout@v2
-    - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v2
-    - name: Login to Docker Hub
-      uses: docker/login-action@v2
-      with:
-        username: ${{ secrets.DOCKERHUB_USERNAME }}
-        password: ${{ secrets.DOCKERHUB_TOKEN }}
-    - name: Build and push msg_relayer docker
-      uses: docker/build-push-action@v2
-      with:
-        context: .
-        file: ./build/dockerfiles/msg_relayer.Dockerfile
-        push: true
-        tags: scrolltech/msg-relayer:${{github.ref_name}}
-        # cache-from: type=gha,scope=${{ github.workflow }}
-        # cache-to: type=gha,scope=${{ github.workflow }}
   rollup_relayer:
     runs-on: ubuntu-latest
     steps: