remove spurious gc_try_claim_and_push

[d-netto]

PR Description

Shouldn't affect correctness and should have a minimal effect on performance. We already fixed this upstream in JuliaLang#49780.

Checklist

Requirements for merging:

• I have opened an issue or PR upstream on JuliaLang/julia: remove duplicate gc_try_claim_and_push JuliaLang/julia#49780
• I have removed the port-to-* labels that don't apply.

[nickrobinson251]

@d-netto please can you set the port-to-* labels as appropriate? (sorry, this PR was opened before i'd got them up and running)
let me know if you've questions!

[d-netto]

We merged this before the 1.10 feature freeze. So given that we've already backported to 1.9, then the ports to 1.10 and master might not be necessary? Not sure though.

[kpamnany]

I think we still need the port to 1.9 label because this has to be backported to 1.9.3 when we upgrade to that.

If it's in 1.10 upstream then I think you're right that we don't need that label or the one for master.

[nickrobinson251]

nice that it's in 1.10!

yeah, exactly as Kiran says, unless it's backported to v1.9 upstream, we need port-to-1.9 label