refactor: remove add_args_kwargs.

[paquiteau]

This module brings little value, and mostly nasty bug by adding extra layers.

We are all consenting adults, no need for enforcing *args and **kwargs

[chaithyagr]

While this surely looks good to me, I will add Sam to review in case we missed some reason why this should exist.

[sfarrens]

Hi @paquiteau this makes sense to me, however shouldn't check_callable then check if the input method does indeed support args and kwargs, because I think (I would need to double check everything) it will break some algorithms if a manually defined operator does not.

Also, if you want to fully clear out this functionality you will need to additionally make the following changes in types.py check_callable:

• remove the add_agrs=True kwarg
• update the Parameters section in the docstring
• update the Returns section in the docstring
• remove the See Also section in the docstring

P.S. "consenting adults" 🤣

[paquiteau]

The checks for the *args and **kwargs is problematic if you consider all the @Property that have been defined, wrapping internal method (a typical examples are the _cost methods, wrapped in cost). The inspect module is not able to time finding the args and kwargs in the definition (which is what causes the nasty bugs mentioned above.

[sfarrens]

@paquiteau all good, feel free to merge. :)