RFR: 8292656: G1: Remove G1HotCardCache::_use_cache

Fri Aug 19 09:56:22 UTC 2022

Simple change  of removing an unneeded field. This PR contains two commits:

1. Removing the field and its accessors.
2. Renaming a method.

Test: hotspot_gc

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Commit messages:
 - rename
 - g1-hot-card-cache

Changes: https://git.openjdk.org/jdk/pull/9939/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9939&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292656
  Stats: 26 lines in 7 files changed: 0 ins; 14 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/9939.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9939/head:pull/9939

PR: https://git.openjdk.org/jdk/pull/9939