RFR: 8340144: C1: remove unused Compilation::_max_spills [v2]

[Denghui Dong]

> Hi,
> 
> Please review this trivial change that removed the unused field Compilation::_max_spills.
> 
> Thanks

Denghui Dong has updated the pull request incrementally with one additional commit since the last revision:

  update

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21007/files
  - new: https://git.openjdk.org/jdk/pull/21007/files/ff4ec1d2..cb1ff832

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21007&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21007&range=00-01

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/21007.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21007/head:pull/21007

PR: https://git.openjdk.org/jdk/pull/21007