The rims for the Delta X are "Tubeless Ready," though the tires are not. You will need a tubeless-compatible tire, and the rim needs to be properly taped, sealant installed, and a new valve stem designed for this purpose. The tire needs to be inflated almost instantaneously the first time to get a proper seal, requiring either an air compressor or a specialized pump made for tubeless setup. Even with all the right tools, success can be elusive, and experience is invaluable.
For these reasons, this conversion is best handled by a bike shop -- fortunately, this is a common upgrade, and any local bike shop can take care of you. We recommend either of the following tires as a good option for tubeless use on the Delta X:
Vee Tire Speedster - 27.5" x 2.8"