Peter owns the formal response but my best bet based on something he wrote a long time ago.

1. He does not have a volume storage issue so I do not believe he needs stuff deleted.
2. It does not directly effect the cost of operation for for him.
3. A.I. (for what it is) will index them anyway if it can get to them. I would not sweat the issue.
4. It will not seriously change things in this modern world so you are good pending Peters return to the forum and correction.

There is one aside it is worth mentioning
Once "AI" has found and indexed your image or content it then it will abuse it and re-purpose it as it feels like. If you have anything that is personal or has a value through copyright etc then always consider putting up some form of reduced/neutered/adjusted version of it so it is trackable where it is being sent.

If you put a modified version of the image on line it is easier to do an image search and find out where it got picked up. If you need any help with it George you are always welcome to ask. A DM in the forum message tool and we can be in touch directly through email etc.