remove grpc from makefile
remove grpc from makefile

SeldonIO/seldon-server,SeldonIO/seldon-server,SeldonIO/seldon-server,SeldonIO/seldon-server,smrjan/seldon-server,smrjan/seldon-server,smrjan/seldon-server,smrjan/seldon-server,smrjan/seldon-server,SeldonIO/seldon-server