I can't. The screw won't come out. I've tried two different repair shops and none of them were able to remove one of the bottom screws to open the phone.
If you really wanted to you could probably use a small drill bit and drill the screw out and then only use a single screw to secure the screen to the body.
I've had to drill out a screw on a nexus 6 at home. That damn phone had somewhere north of 20 screws holding the back together. One got stripped and I drilled into it till the head came off and it was a post instead of a screw from then on.
