How to get my mother dead sister name off deed

I'm not quite understanding the fact so I'll try to give you a general answer.  If a property owner passes away, the property is passed to the surviving joint tenant (as stated on the deed if there are rights of survivorship on the deed), in accordance with the provisions of the owner's Will or, in the absence of either of these two things, in accordance with the law of intestate succession.  I gather from your note that there are no joint tenants on the deed.  If that is the case, it will be necessary to open an estate for the deceased property owner, have a personal representative of the estate appointed and have that person issue a new deed to whomever is entitled to the property according to the Will or law of intestate succession.