RFR: 8294521: Parallel: Remove unused field in UpdateDensePrefixAndCompactionTask

Wed Sep 28 12:24:02 UTC 2022

Trivial change of removing dead code.

Test: build

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Commit messages:
 - pgc-remove-trivial

Changes: https://git.openjdk.org/jdk/pull/10466/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10466&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294521
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10466.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10466/head:pull/10466

PR: https://git.openjdk.org/jdk/pull/10466