DEP: remove PolyBase from np.polynomial.polyutils

[hollycorbett]

DEP: Remove PolyBase from np.polynomial.polyutils

Addresses issue #15658 by removing PolyBase and associated error classes with only usages here. Happy to submit alternative PR using getattr approach instead if desired.

[BvB93]

Can you also remove the exceptions from the stub file?

numpy/numpy/polynomial/polyutils.pyi

Lines 6 to 10 in d3b03c8

	class PolyError(Exception): ...
	class PolyDomainError(PolyError): ...
	# NOTE: Deprecated
	# class PolyBase: ...

[hollycorbett]

All done @BvB93 ... thanks for the heads up. Do let me know if I missed anything.

[charris]

This could use a release note. See doc/release/upcoming_changes for examples. The name should be 18963.expired.rst.

[BvB93]

All done @BvB93 ... thanks for the heads up. Do let me know if I missed anything.

Nop, no further annotation-related comments from me.

[hollycorbett]

@charris PR updated. Happy to squash before merge if preferred.

[rossbar]

I took the liberty of adding a few minor touchups to the release note (basically just formatting + mentioning that the Exceptions are also removed).

LGTM - I'm in favor of removing the objects outright. Thanks @hollycorbett !

[hollycorbett]

@rossbar feedback much appreciated - agree your edit is much better. Thanks! :)

I took the liberty of adding a few minor touchups to the release note (basically just formatting + mentioning that the Exceptions are also removed).

LGTM - I'm in favor of removing the objects outright. Thanks @hollycorbett !

[charris]

Thanks @hollycorbett .