message: Simplify: hide unrelated options
diff: @@ -64,9 +64,7 @@ int main(int argc, char **argv) {
  << "\n";
  });
  - for (auto &I : TopLevelSubCommand->OptionsMap)
  - if (I.second->Category != &C)
  - I.second->setHiddenFlag(ReallyHidden);
  + cl::HideUnrelatedOptions(C);
  ParseCommandLineOptions(argc, argv,
  "C/C++/Objective-C language server\n\n"
  