IsAlgClosed docstring

Stream: Is there code for X?

[Violeta Hernández]

docs#IsAlgClosed says the following:

To show Polynomial.Splits p f for an arbitrary ring homomorphism f, see IsAlgClosed.splits_domain.

But docs#Polynomial.Splits only takes a single argument, after a recent refactor. What should this docstring read now?

[Riccardo Brasca]

I would just remove that part.

[Violeta Hernández]

#34647