RFR: 8294569: Remove CardTable::_last_valid_index

Thu Sep 29 08:02:15 UTC 2022

Simple change of removing a field.

Test: hotspot_gc

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Commit messages:
 - pgc-field-to-method

Changes: https://git.openjdk.org/jdk/pull/10481/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10481&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294569
  Stats: 16 lines in 4 files changed: 3 ins; 5 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/10481.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10481/head:pull/10481

PR: https://git.openjdk.org/jdk/pull/10481