You can delete morphs two ways. You can use Morph Manager by Mason (great for copying morphs from one file to another and combining them as well) or you can open your hierarchy window, choose show all parameters and then go to the body part with the morphs you want to remove, click on the left of the name and press delete. Make sure you spawn a morph target (for the face for example) before deleting all the morphs you used to create it. You can find Morph manager here http://www.geocities.com/mr1_x_1/index.html