Revert r240270 ("Fixed/added namespace ending comments using clang-tidy").

llvm-svn: 240353
diff --git a/clang/lib/Lex/PTHLexer.cpp b/clang/lib/Lex/PTHLexer.cpp
index c2750f6..5f63d35 100644
--- a/clang/lib/Lex/PTHLexer.cpp
+++ b/clang/lib/Lex/PTHLexer.cpp
@@ -721,7 +721,7 @@
     return CacheExists;
   }
 };
-} // namespace clang
+}
 
 std::unique_ptr<FileSystemStatCache> PTHManager::createStatCache() {
   return llvm::make_unique<PTHStatCache>(*FileLookup);