Photo not editable
I inadvertently copied some photos from my Apple Mini to my iPhone. I now can not remove them from the iPhone. I get the message : "The photo is not editable" and the trash can is grayed out.
I'm using High Sierra on the Mini, up to date iTunes, and iOS 11.2.6 on an iPhone 7 plus.
How can I remove these photos from my iPhone ?
Mac mini, Mac OS X (10.5.6)