Removing the eyebrows is best done in Poser by setting the No Eyebrows dial to 1.
For the eyelashes, don’t even bother with a morph. Instead, create a pure black and white texture with the black areas being the geometry you want to keep and the white being what you want to get rid of (I use the Michael and Victoria templates and do it in Photoshop). Import that as an alpha, flip it vertically, and use the Tool>Modifiers>Selection>ALP button to turn it into a mask. Everything but the eyelashes will be masked. Now in the Selection menu, click the Hide Pts or Delete Pts button to get rid of them with ease.