When you sell the house, you have to provide the buyer with a "marketable" title.
A marketable title means a title has no defects or cloud as to the ownership, in another word, a free and clear title.
Having a dead person's name on the title would raise the cloud of who has the right to the inheritance, whether an heir should have been part of the title.
Therefore, to make your title "free and clear", you can go to your clerk of court office in your local county courthouse for help, or engage the service of an estate lawyer.