remove useless manifest test that doesn't validate the fix

Author: code-inflation

.github/workflows/CI.yml

@@ -52,37 +52,3 @@ jobs:
       - name: Build ARM64 Docker image
         run: docker build --platform linux/arm64 -t cybuerg/cfspeedtest:${{ github.sha }}-arm64 .
 
-  docker-test-manifest:
-    needs: [docker-build-amd64, docker-build-arm64]
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-      - name: Test manifest creation capability
-        run: |
-          # Create a simple test manifest to validate the fix works
-          # This ensures the manifest create command works with our build setup
-          echo "Testing Docker manifest creation..."
-          
-          # Create dummy images to test manifest creation
-          docker pull hello-world:latest
-          docker tag hello-world:latest test-image:amd64
-          docker tag hello-world:latest test-image:arm64
-          
-          # Test manifest creation - this will fail if there are manifest list issues
-          docker manifest create test-manifest:latest \
-            test-image:amd64 \
-            test-image:arm64
-          
-          echo "✅ Manifest creation test passed - the fix should work for releases"
-          
-          # Also test that our actual built images don't have manifest list issues
-          echo "Checking if built images are simple manifests..."
-          if docker image inspect cfspeedtest:${{ github.sha }}-amd64 >/dev/null 2>&1; then
-            echo "✅ AMD64 image was built successfully"
-          else
-            echo "❌ AMD64 image not found locally - this is expected in CI"
-          fi
-          
-          # Clean up
-          docker manifest rm test-manifest:latest || true