RFR: 8365190: Remove LockingMode related code from share [v3]

[Fredrik Bredberg]

On Tue, 2 Sep 2025 13:46:11 GMT, Roberto Castañeda Lozano <rcastanedalo at openjdk.org> wrote:

>> Fredrik Bredberg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   New version for Coleen
>
> src/hotspot/share/opto/phaseX.cpp line 1672:
> 
>> 1670:     // Found (linux x64 only?) with:
>> 1671:     //   serviceability/sa/ClhsdbThreadContext.java
>> 1672:     //   -XX:+UnlockExperimentalVMOptions -XX:LockingMode=1 -XX:+IgnoreUnrecognizedVMOptions -XX:VerifyIterativeGVN=1110
> 
> For traceability, I suggest leaving this line untouched and adding a comment in the next line clarifying that `-XX:LockingMode` is not available anymore.

Fixed

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PR Review Comment: https://git.openjdk.org/jdk/pull/27041#discussion_r2322046338