RFR: 8328064: Remove obsolete comments in constantPool and metadataFactory

[Coleen Phillimore]

On Wed, 13 Mar 2024 09:27:41 GMT, Yude Lin <duke at openjdk.org> wrote:

> Clean up some obsolete comments:
> After 8243287, there is no longer the concept of "pseudo-string";
> After 8072061, the "read_only" argument that the comment is referring to is removed.
> 
> Cheers

Looks good and also trivial.  Thanks for the cleanup.

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Marked as reviewed by coleenp (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18266#pullrequestreview-1934618914