You can't remove them from the deed. They own an interest in the property and if you die they will own 100% automatically. You cannot sell or mortgage without their signature. If you want your property back in your name alone the co-owner must convey their interest back to you voluntarily by signing a deed.
![Answers.com](https://cdn-ak-scissors.b.st-hatena.com/image/square/73731f95a7c13968047d0d26cf95d42216e02359/height=288;version=1;width=512/https%3A%2F%2Fst.answers.com%2Fhtml_test_assets%2FAnswers_Blue.jpeg)