RFR: 8301862: G1: Remove G1PageBasedVirtualSpace::_executable

Mon Feb 6 13:21:33 UTC 2023

Simple removing an effectively unused field.

Test: hotspot_gc

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Commit messages:
 - g1-executable

Changes: https://git.openjdk.org/jdk/pull/12439/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12439&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301862
  Stats: 9 lines in 2 files changed: 1 ins; 5 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/12439.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12439/head:pull/12439

PR: https://git.openjdk.org/jdk/pull/12439