LibWeb: Add select and options collection remove method

Author: https://github.com/bplaat
Commit: 7372c01786
Pull-request: https://github.com/SerenityOS/serenity/pull/23895
Reviewed-by: https://github.com/shannonbooth

Userland/Libraries/LibWeb/HTML/HTMLSelectElement.h

@@ -39,6 +39,8 @@ public:
     DOM::Element* item(size_t index);
     DOM::Element* named_item(FlyString const& name);
     WebIDL::ExceptionOr<void> add(HTMLOptionOrOptGroupElement element, Optional<HTMLElementOrElementIndex> before = {});
+    void remove();
+    void remove(WebIDL::Long);
 
     int selected_index() const;
     void set_selected_index(int);