RFR: 8278601: Parallel: Remove redundant code in ObjectStartArray::initialize

Mon Dec 13 11:32:30 UTC 2021

Simple change of removing some redundant code and converting an unnecessary check to an assertion.

Test: hotspot_gc

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Commit messages:
 - object-start-array-record-virtual-mem

Changes: https://git.openjdk.java.net/jdk/pull/6813/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6813&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278601
  Stats: 7 lines in 1 file changed: 0 ins; 6 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6813.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6813/head:pull/6813

PR: https://git.openjdk.java.net/jdk/pull/6813