RFR: 8292790: Remove hashtable.hpp from other files

Tue Aug 23 18:09:20 UTC 2022

On Tue, 23 Aug 2022 17:13:46 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> These includes are no longer needed or haven't been needed for a while.  Tested arm cross-compile, and tier1 with Oracle platforms in progress, also GHA.  Please review this change which is trivial if the test results are clean.

LGTM

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Marked as reviewed by hseigel (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9986