Image templates aren't cleaned up

The action leaves behind an image template on every run - I don't see that I need those for something- is there a reason they're not cleaned up? There is code in the cleanup routine that looks like it wants to delete these but it's commented out for unclear reason.

Probably the underlying resource group should be cleaned up too ...

Start by reading the cleanup routine and locating the commented-out image-template deletion logic. Trace how each run creates the image template and its underlying resource group, then verify the intended cleanup behavior against the action's workflow. Done means completed runs no longer leave unnecessary image templates or resource groups behind.

Written by the indexing model from the issue text.