RFR: 8313207: Remove MetaspaceShared::_has_error_classes

[Calvin Cheung]

On Thu, 27 Jul 2023 19:26:48 GMT, Matias Saavedra Silva <matsaave at openjdk.org> wrote:

> The field _has_error_classes has its value set and change but it is no longer checked after [JDK-8240481](https://bugs.openjdk.org/browse/JDK-8240481). This patch removes all instances MetaspaceShared::_has_error_classes. Verified with tier 1-4 tests.

Looks good.

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Marked as reviewed by ccheung (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15060#pullrequestreview-1550891083