Remove macos wheels from CI (#19263)

Follows #19225 and stops building macos wheels in CI.

### Pull Request Checklist

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pyproject.toml

@@ -424,7 +424,3 @@ test-command = "python -c 'from synapse.synapse_rust import sum_as_string; print
 [tool.cibuildwheel.linux]
 # Wrap the repair command to correctly rename the built cpython wheels as ABI3.
 repair-wheel-command = "./.ci/scripts/auditwheel_wrapper.py -w {dest_dir} {wheel}"
-
-[tool.cibuildwheel.macos]
-# Wrap the repair command to correctly rename the built cpython wheels as ABI3.
-repair-wheel-command = "./.ci/scripts/auditwheel_wrapper.py --require-archs {delocate_archs} -w {dest_dir} {wheel}"