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/CodeGen/PHIElimination.cpp b/llvm/lib/CodeGen/PHIElimination.cpp
index 471c78a..d343301 100644
--- a/llvm/lib/CodeGen/PHIElimination.cpp
+++ b/llvm/lib/CodeGen/PHIElimination.cpp
@@ -104,7 +104,7 @@
                      MachineInstrExpressionTrait> LoweredPHIMap;
     LoweredPHIMap LoweredPHIs;
   };
-} // namespace
+}
 
 STATISTIC(NumLowered, "Number of phis lowered");
 STATISTIC(NumCriticalEdgesSplit, "Number of critical edges split");