Open up Image Capture from your Applications folder while your iPhone is connected. Click on your iPhone’s icon under “DEVICES”. Then choose the option “Delete after import” from the bottom left-hand corner. You can perform your import using Image Capture and send it to Aperture. This creates a project called “Image Capture” in Aperture. Of course this is not as elegant as what iPhoto does.
It turns out the Image Capture is a very useful tool. You can browse your images and see their EXIF data including GPS coordinates in a simple table view. You can import your images and delete them right from the simple interface. It doesn’t handle videos well so be careful.
Update: The video delete problem may have been fixed. Read the comments below and try for yourself to make sure.