Summary:
All in-tree clang-tidy checks have been migrated to the new
ClangTidyCheck::registerPPCallbacks method. Time to drop the old one.
Reviewers: sammccall, hokein
Reviewed By: hokein
Subscribers: xazax.hun, jkorous, arphaman, kadircet, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D60197
llvm-svn: 357582