Remove public engine API call

cmd/utils/flags.go

@@ -2042,9 +2042,10 @@ func RegisterEthService(stack *node.Node, cfg *ethconfig.Config) (ethapi.Backend
 			Fatalf("Failed to create the LES server: %v", err)
 		}
 	}
-	if err := ethcatalyst.Register(stack, backend); err != nil {
-		Fatalf("Failed to register the Engine API service: %v", err)
-	}
+	// We don't want to publicly expose the engine API, instead use grpc endpoints
+	// if err := ethcatalyst.Register(stack, backend); err != nil {
+	// 	Fatalf("Failed to register the Engine API service: %v", err)
+	// }
 	stack.RegisterAPIs(tracers.APIs(backend.APIBackend))
 	return backend.APIBackend, backend
 }