Remove Maybe validator typing

[cdce8p]

Ref home-assistant/core#120450 (comment)

The validator type for Maybe shouldn't be limited to Callable.
In the end it is passed to _WithSubValidators through validators which is currently untyped.

voluptuous/voluptuous/validators.py

Lines 218 to 228 in 2232c0e

	class _WithSubValidators(object):
	"""Base class for validators that use sub-validators.
	Special class to use as a parent class for validators using sub-validators.
	This class provides the `__voluptuous_compile__` method so the
	sub-validators are compiled by the parent `Schema`.
	"""
	def __init__(
	self, *validators, msg=None, required=False, discriminant=None, **kwargs
	) -> None:

Removed the incorrect typing from Maybe for now.

Refs home-assistant/core#120268

[alecthomas]

I don't really understand this change. All validators are callable, so this seems like it should be a valid constraint.

[alecthomas]

But maybe it should be using Schemable instead

[cdce8p]

All validators are callable, so this seems like it should be a valid constraint.

Validators can be callables but don't have to. Just as example, consider vol.Maybe({"key": int}).

Schemable seems to be a good alternative. Used that instead.

[alecthomas]

Sweet, thanks.