how do i delete photos after they are imported

Wait for at least on sucessful backup cycle of your Mac Backup software and then use the camera's format command to reformat and erase the photos

LN

Delete them from where? iPhoto? Your Mac? The camera or phone?

Deleting Photos from an iPhoto Library

1 - from an Event or the Photos mode: select the photo(s) and use the Delete key to move the photos to the trash bin. Then empty the iPhoto Trash bin as follows:

2 - from an album, smart album, book, slideshow, card, etc.: select the photo(s) and use the key combination of Command+Option+Delete to move the photos to the trash bin. Then empty the trash bin as above.

NOTE: deleting a photo from an album, slideshow, book, etc., with only the Delete key only deletes that photo from that item. Deleting a photo from an Event deletes ALL occurences of that photo in the library.

OT

delete from phone

? Popping three words into a thread more than a year old will hardly give enough information for anyone trying to help.