The droneless bagpipe is the third phase in the development of the bagpipe.
We don't know when, where and who one or more persons put a double clarinet to a skin of sheep or goat.
Without a bag you blow on a double clarinet with the reeds in your mouth.
With a skin it is easier to blow: you don't need a special technic for blowing.

Look to this map:

You'll find the droneless bagpipe in Asia, Russia and in countries around the Mediterranean.
alos in France, England and Holland.

Here you see a droneless bagpipe from India, called Sruti Upanga: