Revert "Fix build issue in assert mode introduced by 6427f4c"

This reverts commit d65a3b3.
Breaks build everywhere, see e.g. http://45.33.8.238/linux/66344/step_4.txt
or https://lab.llvm.org/buildbot/#/builders/139/builds/16811

llvm/lib/Support/CommandLine.cpp

@@ -2356,9 +2356,7 @@ class CategorizedHelpPrinter : public HelpPrinter {
     for (size_t I = 0, E = Opts.size(); I != E; ++I) {
       Option *Opt = Opts[I].second;
       for (auto &Cat : Opt->Categories) {
-        assert(std::binary_search(SortedCategories.begin(),
-                                  SortedCategories.end(), Cat,
-                                  OptionCategoryCompare) &&
+        assert(CategorizedOptions.count(Cat) > 0 &&
                "Option has an unregistered category");
         CategorizedOptions[Cat].push_back(Opt);
       }