To remove or relinquish the use of something little by little(verb)
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Use "phase out" in a sentence
"After one of my sessions on cosmetics ingredients, Hulda counted her antiperspirant/ deodorant roll-on, which was labeled as hypoallergenic, among one of the products she would phase out of her personal care routine."
"It wasn't until the day before the fleet was to phase out of Underspace that he remembered the kindly Lepar, Itepu."
"But its time to phase out Fannie Mae and Freddie Maclet them go the way of the S&L."