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/CodeGen/StatepointExampleGC.cpp b/llvm/lib/CodeGen/StatepointExampleGC.cpp
index b9523e5..95dfd75 100644
--- a/llvm/lib/CodeGen/StatepointExampleGC.cpp
+++ b/llvm/lib/CodeGen/StatepointExampleGC.cpp
@@ -45,7 +45,7 @@
     return (1 == PT->getAddressSpace());
   }
 };
-} // namespace
+}
 
 static GCRegistry::Add<StatepointGC> X("statepoint-example",
                                        "an example strategy for statepoint");