RFR: 8305500: SystemDictionary::find_placeholder/find_class declared but not used

[Coleen Phillimore]

On Mon, 3 Apr 2023 22:49:37 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> Removed two function declarations we don't use from SystemDictionary.
> Tested tier1 on linux/macosx/windows x84/aarch64

Thanks for the reviews.

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PR Comment: https://git.openjdk.org/jdk/pull/13313#issuecomment-1495866761