[jdk17u-dev] RFR: 8278893: Parallel: Remove GCWorkerDelayMillis [v2]

[Richard Reingruber]

> This backport is a dependency for the backport of https://bugs.openjdk.org/browse/JDK-8310031
> Applies cleanly.
> No risk: only unused debug code is removed.
> 
> Local CI Testing:
> The fix passed our CI testing (e.g. 2024-02-23): JTReg tests: tier1-4 of hotspot and jdk. All of Langtools and jaxp. JCK, SPECjvm2008, SPECjbb2015, Renaissance Suite, and SAP specific tests (also with ParallelGC).
> Testing was done with fastdebug builds on the main platforms and also on Linux/PPC64le.

Richard Reingruber has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/2227/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/2227/files/080e0002..080e0002

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2227&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2227&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2227.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2227/head:pull/2227

PR: https://git.openjdk.org/jdk17u-dev/pull/2227