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

Apparently, the style needs to be agreed upon first.

llvm-svn: 240390

lib/Bitcode/Writer/BitcodeWriterPass.cpp

@@ -41,7 +41,7 @@ namespace {
       return false;
     }
   };
-} // namespace
+}
 
 char WriteBitcodePass::ID = 0;