Remove comment which indicates that grpc code-in-sync check is not ru…

…n on CI

Makefile

@@ -89,5 +89,4 @@ generate-grpc:  ## generate grpc code
 check-generate-grpc-code-in-sync: generate-grpc
 check-generate-grpc-code-in-sync: ## check if the generated code is in sync with the proto files
 	# this is a helper to check if the generated code is in sync with the proto files
-	# it's not run on CI at the moment
 	git diff --exit-code rasa_sdk/grpc_py | if [ "$$(wc -c)" -eq 0 ]; then echo "Generated code is in sync with proto files"; else echo "Generated code is not in sync with proto files"; exit 1; fi