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/Target/Mips/Mips16HardFloat.cpp b/llvm/lib/Target/Mips/Mips16HardFloat.cpp
index f2831fd..893fc7c 100644
--- a/llvm/lib/Target/Mips/Mips16HardFloat.cpp
+++ b/llvm/lib/Target/Mips/Mips16HardFloat.cpp
@@ -62,7 +62,7 @@
   };
 
   char Mips16HardFloat::ID = 0;
-} // namespace
+}
 
 //
 // Return types that matter for hard float are: