RFR: 8357188: Remove the field MemAllocator::Allocation::_overhead_limit_exceeded and the related code [v2]

[Guoxiong Li]

> Hi all,
> 
> After JDK-8338977 [1], the field `MemAllocator::Allocation::_overhead_limit_exceeded` and the parameter `gc_overhead_limit_was_exceeded` of the method `CollectedHeap::mem_allocate` are not used by any GC. This patch removes them.
> 
> Test:
> All the tests of the command `make test TEST="hotspot:hotspot_gc"` passed locally (linux, x86_64, release build).
> 
> Best Regards,
> -- Guoxiong
> 
> [1] https://bugs.openjdk.org/browse/JDK-8338977

Guoxiong Li has updated the pull request incrementally with one additional commit since the last revision:

  Remove outdated comments.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/27020/files
  - new: https://git.openjdk.org/jdk/pull/27020/files/d617cbd5..949e1620

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27020&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27020&range=00-01

  Stats: 5 lines in 1 file changed: 0 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27020.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27020/head:pull/27020

PR: https://git.openjdk.org/jdk/pull/27020