Fix !icon_map.has(p_type) error

"ResizedFolder" "ResizedFile" icons are removed from 15904d6

editor/editor_file_dialog.cpp

@@ -107,8 +107,6 @@ void EditorFileDialog::_notification(int p_what) {
 		fav_down->set_icon(get_icon("MoveDown", "EditorIcons"));
 		fav_rm->set_icon(get_icon("RemoveSmall", "EditorIcons"));
 
-		Theme::get_default()->clear_icon("ResizedFile", "EditorIcons");
-		Theme::get_default()->clear_icon("ResizedFolder", "EditorIcons");
 		update_file_list();
 	}
 }