Well, I was a little too optimistic on this one.
I can only delete the directory where the actual episode was originally located in.
Looking at parent directories comes with issues since during a rename RMTV no longer knows if just a file or a directory was dropped on it.
So I'd potentially delete too much.
To illustrate this:
Lets say we have this structure for a file:
/some/directory/path/myfiles/show1/season1
The episode file resides in "season1" and the episode gets moved away after a rename.
Now "season1" is empty and we'd like to remove that one.
So far so good, and this is how it works right now.
If I'd look at the parent "show1" then that one could now be empty as well, but I am not sure if that one should be removed.
Now lets assume we would do this (RMTV does not know if you dropped a single file, or maybe the entire "myfiles" directory, it only knows the full path of the file).
Say "myfiles" is now empty as well, should this be removed? And on and on.
I can see directory structures being removed to a level that most users would not want to.
I'm keeping this in mind though as I do understand your use case. I just do not have a good option right now without causing problems for others.