Just remove the valve stem and put slime in your tire. I did this to my scoot and the repair lasted 14 months and 4,000 miles (note: I just left the nail in all that time). I could have re-slimed it but I decided to take the wheel off and do a plug and patch and replace the valve stem (which had a split in the rubber, which fixed it. Strange thing when I filled the tire to 40psi and submerged it completely in water there were no air bubbles anywhere not from the valve stem either. I just decided to pull the nail and plug and patch. After 10 days no air loss.
By the way.... The old slime from a year earlier just washed right off. It was still liquid and stuck lightly to the rim and the inside of the tire. A little light brushing and all was fine. This will save you a lot of time and work.
Also, if both nail holes are next to each other you can just drill and use a larger plug.