Deleted crop is not being removed from the directory

[bdeng3]

Hey team,

We found an issue here:

Say if we have an image and three bounding boxes A, B and C, and save them by Export Recognition Result. Then after a while, we notice A is being mislabeled. So we deleted A inside the app. However, if we hit Export Recognition Result again, we'll notice the cropped image of A is still there in the file system.

Any thoughts in removing deleted bounding boxes in the file system?