LibWeb: Fix internal logic for recognizing non-abstract ARIA roles

Author: https://github.com/sideshowbarker
Commit: ce65457746
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2964
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/ARIA/Roles.cpp

@@ -173,15 +173,6 @@ bool is_windows_role(Role role)
         Role::dialog);
 }
 
-bool is_non_abstract_role(Role role)
-{
-    return is_widget_role(role)
-        || is_document_structure_role(role)
-        || is_landmark_role(role)
-        || is_live_region_role(role)
-        || is_windows_role(role);
-}
-
 // https://www.w3.org/TR/wai-aria-1.2/#namefromcontent
 bool allows_name_from_content(Role role)
 {