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/DebugInfo/DWARF/SyntaxHighlighting.h b/llvm/lib/DebugInfo/DWARF/SyntaxHighlighting.h
index 84afd37..946a313 100644
--- a/llvm/lib/DebugInfo/DWARF/SyntaxHighlighting.h
+++ b/llvm/lib/DebugInfo/DWARF/SyntaxHighlighting.h
@@ -32,8 +32,8 @@
   llvm::raw_ostream& get() { return OS; }
   operator llvm::raw_ostream& () { return OS; }
 };
-} // namespace syntax
-} // namespace dwarf
-} // namespace llvm
+}
+}
+}
 
 #endif