New diagnostic: The Values attribute can be simplified.

[Bartleby2718]

As mentioned in https://docs.nunit.org/articles/nunit/writing-tests/attributes/values.html#values-with-enum-or-boolean

[Test]
public void MyBoolTest([Values(true, false)] bool value) { /* ... */ } 

can be simplified to

[Test]
public void MyBoolTest([Values] bool value) { /* ... */ } 

We could add a new diagnostic to detect and simplify this.

The same goes for nullable boolean and enums.

[Bartleby2718]

I can take a stab at this, so please assign this to me!

[manfred-brands]

I can take a stab at this, so please assign this to me!

Done. Go ahead.

[mikkelbu]

Fixed by #758