Freezed Lint reports unneeded private empty constructor

[snapsl]

Describe the bug
Freezed Lint reports to create an private empty constructor when a static class method or variable is added.

To Reproduce

@freezed
class Example with _$Example {
  static const int a = 0; // <- causes lint rule to trigger

  static String b = 0.toString(); // <- causes lint rule to trigger

  static int c() => 0; // <- causes lint rule to trigger

  const factory Example({
    required String e,
  }) = _Example;
}

Expected behavior
Lint rule should not apply.