Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)

Apparently, the style needs to be agreed upon first.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240390 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/FlattenCFG.cpp

@@ -46,7 +46,7 @@ public:
   FlattenCFGOpt(AliasAnalysis *AA) : AA(AA) {}
   bool run(BasicBlock *BB);
 };
-} // namespace
+}
 
 /// If \param [in] BB has more than one predecessor that is a conditional
 /// branch, attempt to use parallel and/or for the branch condition. \returns