On the main screen, tap the three lines at the bottom right. On the next screen tap the icon at the bottom right (that looks like something from a London Underground map). Then switch off Eats and save.
(Edit MyJessicaLS430 just posted a better version of this with screenshots).
In three tries last week I was able to tap "save" fast enough - I kept getting UberX requests... Purposefully painful. (used to be two quick steps, now it's three steps, all of which work much more slowly)
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