Unused did-you-mean helper

src/dds/dym.cpp

 
     return matrix.back().back();
 }
-
-bool lm_reject_dym::operator()(std::string_view context,
-                               std::string_view key,
-                               std::string_view) const {
-    assert(candidates.size() > 0);
-    throw_user_error<errc::invalid_config_key>("{}: Unknown key '{}' (Did you meann '{}'?)",
-                                               context,
-                                               key,
-                                               *did_you_mean(key, candidates));
-}

src/dds/dym.hpp

     return did_you_mean(given, ranges::views::all(strings));
 }
 
-struct lm_reject_dym {
-    std::initializer_list<std::string_view> candidates;
-
-    [[noreturn]] bool
-    operator()(std::string_view context, std::string_view key, std::string_view value) const;
-};
-
 }  // namespace dds