As little as they are, I think they are petunias. Let them grow if you want. They will probably be whatever you had last year.
They look like Petunias. Don't disturb them, they are too small to survive it. If/when the Morning Glory seedlings appear, wait until they are about 3-4 inches tall, water the soil well, then you can pull up extras. And at that point the Petunia seedlings will be strong enough to handle being transplanted it that is necessary. You can also leave them in there with the petunias, they will grow just fine in the same pot as long as you have a trellis for the MGs to grab onto. MG's don't get bushy at ground level so they will grow up through the Petunias with no trouble.
