I would translate as deslizar
or arrastrar
Desliza el dedo por la pantalla para descartar
Deslice el dedo hacia la izquierda para descartar
Arrastre el dedo por la pantalla para descartar
Deslizar
and arrastrar
convey well the meaning that you are moving your finger with a swift movement while touching the screen. I also see "swipe" in the context of a credit/debit card:
Swipe your card to pay / Swipe your card and follow the instructions on the screen
in which case "swipe" should be translated only as deslizar
, but not arrastrar
. Maybe you could even use pasar
Pase su tarjeta de débito/crédito y siga las instrucciones de la pantalla
but I would favor deslizar
. For an action on a smartphone screen, I would also favor deslizar
over pasar
.