Way to unset property

[crazynds]

Summary

I have a base model that all of my models extend. In this base model, I define some column casts that not all models actually have — but if a model does have those columns, the cast is already defined.

When using this library, it generates documentation for these columns whether they exist on the model or not. I tried to create a hook to remove those properties, but there is no unsetProperty method like there is for the setter counterpart.

[crazynds]

It's a simple change, just add a unsetProperty to ModelsCommand class.