avoid_init_to_null fix of late initialize causes runtime errors

[jezell]

late Object? something = null;

avoid_init_to_null changes to

late Object? something;

Needs to change to:

Object? something;

Or code blows up at runtime after applying the fix.

[jezell]

Sample here can repro locally, after applying fix crashes at runtime:

https://dartpad.dev/?id=be1beabcbd3837916621f4c78d474c9b