I didn’t go far enough with this.
So the labeling in the menu is wrong or incomplete. In Album view (tab) Cmd-delete is shown as remove from Album
In All Photos view (tab), the same command is listed as Delete File
Yet it appears delete key does the same thing. Are Cmd-delete and delete the same in these two cases? If so the menus need changing. The documentation only has delete (no Cmd-delete).
You can delete a file in Album view using a right click and selecting delete.
I can see the logic of having delete be context sensitive (although one can forget if they are in an Album or All Photos). But while in Album view I’d like a keyboard shortcut to be able to delete a file also. (Use case is that I bring all photos from an event into an Album and then downselect for posting on Smugmug but as I often have multiple nearly the same photos or plain bad photos I’d just like to delete the file). Not only is there no shortcut, but if you right click you have to confirm your choice.
I tried using Keyboard Maestro to program deleting a file in Album View, but can figure out how to simulate selecting delete after the right click since typing “del” doesn’t do anything (which it often does in this situation on true macOS apps.