Simplify errors.Is nil check

Proprietary

Replace redundant errors.Is(err, nil) with err == nil.

org.openrewrite.golang.codequality.SimplifyErrorsIsNil

mod run . --recipe=org.openrewrite.golang.codequality.SimplifyErrorsIsNil

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.