Removing the change about headers, since it's the wrong file.

doc/core/pending_api_cleanups.md

@@ -15,7 +15,4 @@ number:
   `include/grpc/impl/codegen/grpc_types.h` (commit `af00d8b`)
   (cannot be done until after next grpc release, so that TensorFlow can
   use the same code both internally and externally)
-- get rid of all of the grpc++ headers that are currently deprecated
-  in favor of their grpcpp counterpart due to iOS' parsing issue on the
-  plus sign.
 - require a C++ runtime for all languages.