Withdrawn: 8319463: ClassSignature should have superclass and superinterfaces as ClassTypeSig

[duke]

On Mon, 6 Nov 2023 06:41:22 GMT, Chen Liang <liach at openjdk.org> wrote:

> Discovered while writing a test for #16513 that `ClassSignature.superclassSignature()` does not return a `ClassTypeSig`, yet [JVM Spec](https://docs.oracle.com/javase/specs/jvms/se21/html/jvms-4.html#jvms-4.7.9.1-4100) requires it to be one. This patch adds such a requirement to the accessors, factories, and the parsing logic.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/16514