[PATCH] D44826: Add -Wunused-using, a warning that finds unused using declarations.

[Eugene Zelenko via Phabricator via cfe-commits]

Eugene.Zelenko added a comment.

This duplicates Clang-tidy misc-unused-using-decls <http://clang.llvm.org/extra/clang-tidy/checks/misc-unused-using-decls.html>. If Clang will provide same or better functionality, it should be removed.


Repository:
  rC Clang

https://reviews.llvm.org/D44826