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

Apparently, the style needs to be agreed upon first.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240390 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/Mutex.cpp

@@ -110,7 +110,7 @@ MutexImpl::tryacquire()
   return errorcode == 0;
 }
 
-} // namespace llvm
+}
 
 #elif defined(LLVM_ON_UNIX)
 #include "Unix/Mutex.inc"