There are several ways:
- If you turn on directory mode, the prices will go away automatically.
Like here: https://www.coffee-statistics.com/best-single-serve-coffee-maker/
- There are also special modules, for example for opencart (Module Remove product price for Opencart). This is a modification that allows you to disable the display of prices on the site.
If we are talking about Prestashop, you may try Bulk/Mass editing products module. Here are even more functions than in previous one.