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/Support/Unix/Program.inc b/llvm/lib/Support/Unix/Program.inc
index dc633ab..8947b62 100644
--- a/llvm/lib/Support/Unix/Program.inc
+++ b/llvm/lib/Support/Unix/Program.inc
@@ -176,7 +176,7 @@
 #endif
 }
 
-} // namespace llvm
+}
 
 static bool Execute(ProcessInfo &PI, StringRef Program, const char **args,
                     const char **envp, const StringRef **redirects,
@@ -473,4 +473,4 @@
   }
   return true;
 }
-} // namespace llvm
+}