Remove workarounds to issues with build env for oneMath interface

[antonwolfy]

This PR partially removes workarounds added in #2646

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/index.html

[github-actions]

Array API standard conformance tests for dpnp=0.21.0dev0=py313h509198e_16 ran successfully.
Passed: 1356
Failed: 4
Skipped: 16

[coveralls]

coverage: 78.444% (+0.003%) from 78.441% — remove-wa-to-gh-action-onemath into master