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/Utils/InstructionNamer.cpp b/llvm/lib/Transforms/Utils/InstructionNamer.cpp
index c9bec9a..da890a2 100644
--- a/llvm/lib/Transforms/Utils/InstructionNamer.cpp
+++ b/llvm/lib/Transforms/Utils/InstructionNamer.cpp
@@ -50,7 +50,7 @@
   };
   
   char InstNamer::ID = 0;
-} // namespace
+}
 
 INITIALIZE_PASS(InstNamer, "instnamer", 
                 "Assign names to anonymous instructions", false, false)