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/Analysis/LoopPass.cpp b/llvm/lib/Analysis/LoopPass.cpp
index 81b7ecd..e9fcf02 100644
--- a/llvm/lib/Analysis/LoopPass.cpp
+++ b/llvm/lib/Analysis/LoopPass.cpp
@@ -56,7 +56,7 @@
 };
 
 char PrintLoopPass::ID = 0;
-} // namespace
+}
 
 //===----------------------------------------------------------------------===//
 // LPPassManager