RFR: 8245026: PsAdaptiveSizePolicy::_old_gen_policy_is_ready is unused

Wed Nov 25 13:38:08 UTC 2020

`PsAdaptiveSizePolicy::_old_gen_policy_is_ready` is initialized, is assigned, and has an accessor, but is never read and the accessor is never called. 
Browsing through some repository history, shows no apparent evidence of it ever being used.

Testing: tier1, tier2, tier3

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Commit messages:
 - Merge remote-tracking branch 'origin/master' into JDK-8245026
 - Merge remote-tracking branch 'origin/master' into JDK-8245026
 - 8245026: PsAdaptiveSizePolicy::_old_gen_policy_is_ready is unused

Changes: https://git.openjdk.java.net/jdk/pull/1434/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1434&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8245026
  Stats: 13 lines in 2 files changed: 0 ins; 13 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1434.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1434/head:pull/1434

PR: https://git.openjdk.java.net/jdk/pull/1434