D.M.
Hi K.,
It sounds like he's ready to drop the morning nap. I wouldn't worry about him becoming sleep deprived because you'll probably find he makes up for it during his afternoon nap.
My little boy dropped his morning nap at about 14 months. He used to do an hour in the morning and about an hour and 1/2 after lunch. Once we dropped the morning nap I found he slept for 2 - 2 1/2 hours at lunchtime.
To ease the transition, I also temporarily brought lunch and his afternoon nap forward by 1/2 an hour until he was used to the change and then gradually put it back to the usual time.
Good luck. All the best, D.