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/ARM/MCTargetDesc/ARMMachObjectWriter.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMMachObjectWriter.cpp
index 6ac778e..95d7ea7 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMMachObjectWriter.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMMachObjectWriter.cpp
@@ -56,7 +56,7 @@
                         const MCFixup &Fixup, MCValue Target,
                         uint64_t &FixedValue) override;
 };
-} // namespace
+}
 
 static bool getARMFixupKindMachOInfo(unsigned Kind, unsigned &RelocType,
                               unsigned &Log2Size) {