RFR: 8304716: Clean up G1Policy::calc_max_old_cset_length() [v2]

[Thomas Schatzl]

> Hi all,
> 
>   please review this simplification of `G1Policy::calc_max_old_cset_length()`. It does not seem important to be clever here.
> 
> Depends on #13147.
> 
> Testing: gha
> 
> Thanks,
>   Thomas

Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:

  ayang review, break formula a bit

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/13148/files
  - new: https://git.openjdk.org/jdk/pull/13148/files/124b3953..8ad6e934

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13148&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13148&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13148.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13148/head:pull/13148

PR: https://git.openjdk.org/jdk/pull/13148