removeList method
Implementation
void removeList(int index) {
if (index >= 0 && index < draggableLists.value.length) {
final updatedList = List<ListModel>.from(draggableLists.value);
updatedList.removeAt(index);
draggableLists.value = updatedList;
}
if (canWrite) {
removeTextController(index);
}
}