RFR: 8327240: Obsolete Tier2CompileThreshold/Tier2BackEdgeThreshold product flags [v2]

[Sonia Zaldana Calles]

> Hi all, 
> 
> This PR removes the unused options ```Tier2CompileThreshold``` and ```Tier2BackEdgeThreshold```. 
> 
> Testing: 
> - [x] Verified unrecognized option error is reported after removing options. 
> 
> Thanks, 
> Sonia

Sonia Zaldana Calles has updated the pull request incrementally with one additional commit since the last revision:

  Deleting usage of flag in test

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18904/files
  - new: https://git.openjdk.org/jdk/pull/18904/files/2eeab209..ed6b0048

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18904&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18904&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18904.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18904/head:pull/18904

PR: https://git.openjdk.org/jdk/pull/18904