remove null check code

[Hanope]

I think it is unnecessary to check the null of instanceStatus.
Because it doesn't matter if instanceStatus is null when calling overrideStatus.equals

[troshko111]

You're correct from the logical perspective and the change will be equivalent, but it looks to me the intent of the check was readability(?), it reads "if no override or unequal override", without the null check it makes you think harder what the intent is.