Remove thread sleeps that were needed for old Julia versions on macOS ARM

[efaulhaber]

These made the lagging issues a little better, but slowed down other architectures. For Julia 1.10, this is no longer needed.
I tested Julia 1.9, and the lagging is bad either way, so I don't see any reason to keep this. Discouraging users from using Julia 1.9 on macOS ARM is probably the better solution.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.50%. Comparing base (720e728) to head (106eed4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #2   +/-   ##
=======================================
  Coverage   71.50%   71.50%           
=======================================
  Files           7        7           
  Lines         200      200           
=======================================
  Hits          143      143           
  Misses         57       57           

Flag	Coverage Δ
unit	71.50% <ø> (ø)

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[sloede]

I concur with your assessment 👍