RFR: 8292790: Remove hashtable.hpp from other files

Tue Aug 23 20:43:57 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.

This is never going to finish but builds everywhere here.

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