Fix to #309

[paramaw]

Fix #309.
Fix to warning on the logs when using Flutter 3.0.0 with the flutter_form_bloc library

[aaassseee]

@paramaw duplicate with #312

[vasilich6107]

@paramaw

This is not the first time when form_bloc has issues with delivery

Today I removed last piece of code and form_bloc as dependancy.

I recommend you pay attaention to reactive_forms

• form itself https://pub.dev/packages/reactive_forms
• a lot of prebuilt widgets ready to use https://github.com/artflutter/reactive_forms_widgets
• code gen for strictly typed forms https://github.com/artflutter/reactive_forms_generator

[GiancarloCode]

Thanks, fixed with #312