Remove deprecated support for returning non-complex/float types in __complex__/__float__()

[skirpichev]

This was deprecated since v3.7 (in #74080 and #71170). Our deprecation policy allow us to remove this.

@serhiy-storchaka what's your opinion?

Linked PRs

• gh-109311: Remove support for non-complex/float types in __complex/float__ #112680

[corona10]

cc @mdickinson

[skirpichev]

BTW, support for int subclasses in __int__() was deprecated in 3.10 (#15636), so formally we can remove this in 3.13 as well.

[serhiy-storchaka]

https://discuss.python.org/t/about-type-conversion-special-methods/94212