ci: remove buildx from build main workflow

.github/workflows/build.yml

@@ -37,12 +37,6 @@ jobs:
         mv package.json pkg-temp.json
         jq -r '. + {dev:false, version:"$REL_VERSION_STRICT"}' pkg-temp.json > package.json
         rm pkg-temp.json
-        
-    - name: Set up QEMU
-      uses: docker/setup-qemu-action@v1
-      
-    - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v1
     
     - name: Login to DockerHub
       uses: docker/login-action@v1 
@@ -62,7 +56,6 @@ jobs:
       with:
         context: .
         file: dev/build/Dockerfile
-        platforms: linux/amd64,linux/arm64
         push: true
         tags: |
           requarks/wiki:canary