RFR: 8296734: JarVerifier:: mapSignersToCodeSource should cache in map

[Sean Mullan]

On Thu, 10 Nov 2022 01:02:00 GMT, pandaapo <duke at openjdk.org> wrote:

> The cache named `signerToCodeSource` in `JarVerifier` is never used now.

If you want to instead do some general cleanup in this class for JDK 20, you could instead remove this method and several other unused methods from `JarVerifier`.

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PR: https://git.openjdk.org/jdk/pull/11072