Merge pull request #7559 from dgquintas/codegen_cleanse

BUILD

CMakeLists.txt

Makefile

build.yaml

gRPC-Core.podspec

grpc.def

grpc.gemspec

include/grpc++/impl/codegen/async_unary_call.h

include/grpc++/impl/codegen/call.h

include/grpc++/impl/codegen/client_context.h

include/grpc++/impl/codegen/completion_queue.h

include/grpc++/impl/codegen/core_codegen.h

include/grpc++/impl/codegen/core_codegen_interface.h

include/grpc++/impl/codegen/grpc_library.h

include/grpc++/impl/codegen/proto_utils.h

include/grpc++/impl/codegen/rpc_service_method.h

include/grpc++/impl/codegen/server_context.h

include/grpc++/impl/codegen/server_interface.h

include/grpc++/impl/codegen/sync_no_cxx11.h

include/grpc++/impl/codegen/sync_stream.h