GSB: Remove a couple of well-formedness assertions [5.4]#38013

drexin merged 1 commit intoswiftlang:release/5.4swiftlang/swift:release/5.4from

slavapestov:allow-bogus-same-type-in-signature-5.4slavapestov/swift:allow-bogus-same-type-in-signature-5.4Copy head branch name to clipboard