Documentation cleanup: Delete a duplicated/malformed doc comment.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159628 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Basic/SourceManager.cpp

@@ -1854,8 +1854,6 @@ bool SourceManager::isBeforeInTranslationUnit(SourceLocation LHS,
   return LOffs.first < ROffs.first;
 }
 
-/// PrintStats - Print statistics to stderr.
-///
 void SourceManager::PrintStats() const {
   llvm::errs() << "\n*** Source Manager Stats:\n";
   llvm::errs() << FileInfos.size() << " files mapped, " << MemBufferInfos.size()