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/SelectionDAG/LegalizeVectorOps.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
index 50ad239..c06227b 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
@@ -1010,7 +1010,7 @@
   return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Ops);
 }
 
-} // namespace
+}
 
 bool SelectionDAG::LegalizeVectors() {
   return VectorLegalizer(*this).Run();