Revert "Fix method name for custom callable"

This reverts commit e88095e.

Fixes godotengine#92695.

core/object/undo_redo.cpp

@@ -159,11 +159,10 @@ void UndoRedo::add_do_method(const Callable &p_callable) {
  do_op.ref = Ref<RefCounted>(Object::cast_to<RefCounted>(object));
  }
  do_op.type = Operation::TYPE_METHOD;
- // There's no `get_method()` for custom callables, so use `operator String()` instead.
- if (p_callable.is_custom()) {
+ do_op.name = p_callable.get_method();
+ if (do_op.name == StringName()) {
+ // There's no `get_method()` for custom callables, so use `operator String()` instead.
  do_op.name = static_cast<String>(p_callable);
- } else {
- do_op.name = p_callable.get_method();
  }
 
  actions.write[current_action + 1].do_ops.push_back(do_op);
@@ -191,11 +190,10 @@ void UndoRedo::add_undo_method(const Callable &p_callable) {
  }
  undo_op.type = Operation::TYPE_METHOD;
  undo_op.force_keep_in_merge_ends = force_keep_in_merge_ends;
- // There's no `get_method()` for custom callables, so use `operator String()` instead.
- if (p_callable.is_custom()) {
+ undo_op.name = p_callable.get_method();
+ if (undo_op.name == StringName()) {
+ // There's no `get_method()` for custom callables, so use `operator String()` instead.
  undo_op.name = static_cast<String>(p_callable);
- } else {
- undo_op.name = p_callable.get_method();
  }
 
  actions.write[current_action + 1].undo_ops.push_back(undo_op);