Merge pull request #17760 from Norman0406/fix-interceptor_memory_leak

Fixing memory leak in interceptor by removing unsued send_status_

include/grpcpp/impl/codegen/interceptor_common.h

@@ -403,7 +403,6 @@ class InterceptorBatchMethodsImpl
   grpc_status_code* code_ = nullptr;
   grpc::string* error_details_ = nullptr;
   grpc::string* error_message_ = nullptr;
-  Status send_status_;
 
   std::multimap<grpc::string, grpc::string>* send_trailing_metadata_ = nullptr;