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

Apparently, the style needs to be agreed upon first.

llvm-svn: 240390
diff --git a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp b/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
index c99dc5f..c505584 100644
--- a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
+++ b/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
@@ -92,7 +92,7 @@
       AU.addPreserved<MemoryDependenceAnalysis>();
     }
   };
-} // namespace
+}
 
 char DSE::ID = 0;
 INITIALIZE_PASS_BEGIN(DSE, "dse", "Dead Store Elimination", false, false)