Revert r240270 ("Fixed/added namespace ending comments using clang-tidy").

llvm-svn: 240353
diff --git a/clang/lib/Serialization/ModuleManager.cpp b/clang/lib/Serialization/ModuleManager.cpp
index f5dff2c..03d8ed0 100644
--- a/clang/lib/Serialization/ModuleManager.cpp
+++ b/clang/lib/Serialization/ModuleManager.cpp
@@ -534,7 +534,7 @@
       return M->ModuleName;
     }
   };
-} // namespace llvm
+}
 
 void ModuleManager::viewGraph() {
   llvm::ViewGraph(*this, "Modules");