Remove refs to tensorflow_metadata (feast-dev#2063)

Signed-off-by: Achal Shah <achals@gmail.com>

Makefile

@@ -48,7 +48,6 @@ package-protos:
 compile-protos-python:
 	@$(foreach dir,$(PROTO_TYPE_SUBDIRS),cd ${ROOT_DIR}/protos; python -m grpc_tools.protoc -I. --grpc_python_out=../sdk/python/feast/protos/ --python_out=../sdk/python/feast/protos/ --mypy_out=../sdk/python/feast/protos/ feast/$(dir)/*.proto;)
 	@$(foreach dir,$(PROTO_TYPE_SUBDIRS),grep -rli 'from feast.$(dir)' sdk/python/feast/protos | xargs -I@ sed -i.bak 's/from feast.$(dir)/from feast.protos.feast.$(dir)/g' @;)
-	cd ${ROOT_DIR}/protos; python -m grpc_tools.protoc -I. --python_out=../sdk/python/ --mypy_out=../sdk/python/ tensorflow_metadata/proto/v0/*.proto
 
 install-python:
 	python -m pip install -e sdk/python -U --use-deprecated=legacy-resolver
@@ -114,7 +113,6 @@ install-go-ci-dependencies:
 	go get -u golang.org/x/lint/golint
 
 compile-protos-go:
-	cd ${ROOT_DIR}/protos; protoc -I/usr/local/include -I. --go_out=plugins=grpc,paths=source_relative:../sdk/go/protos/ tensorflow_metadata/proto/v0/*.proto
 	$(foreach dir,types serving core storage,cd ${ROOT_DIR}/protos; protoc -I/usr/local/include -I. --go_out=plugins=grpc,paths=source_relative:../sdk/go/protos feast/$(dir)/*.proto;)
 
 test-go: