What is the best way to remove someone's name from a mortgage loan if they are the co borrower w/o refinancing

My mother is the borrower and I am the co borrower. She has always made payments on the loan. It was better for the both of us to qualify. I am ready to move out and want to remove my name so that I can get something. I really dont her (my mother) to go through the process of refinancing the way things are now.
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