namespace grpc {
-grpc_error* CensusChannelData::Init(grpc_channel_element* elem,
- grpc_channel_element_args* args) {
+grpc_error* CensusChannelData::Init(grpc_channel_element* /*elem*/,
+ grpc_channel_element_args* /*args*/) {
return GRPC_ERROR_NONE;
}