False positive when eliminating package-private class / object

[lrytz]

Removing a package private class or object should be allowed.

Test case in https://github.com/lightbend/mima/compare/main...lrytz:package-private-tests?expand=1

[SethTisue]

@dwijnand was this fully addressed by #583 and/or #683?

[SethTisue]

pretty sure it was, so, closing. but see also ensuing discussion at #724