pydeps should ignore TYPE_CHECKING imports

[josephdviviano]

In order to avoid circular imports but support type checking against user-defined classes, the following is currently done:

from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from gfn.envs.env import Env
    from gfn.containers.states import States

However this results in a circular or otherwise messy dependency graph in pydeps, even though these imports are only used for type checking. To mitigate this, one solution would be to completely ignore all dependencies that fall under TYPE_CHECKING, or optionally remove them from the output graph with a command line flag.

[josephdviviano]

I'm closing this - I think this feature does not make sense upon reflection.