Hi, 

You can achieve this by editing the code. The template rendered when adding the recently viewed products snippet is in website_sale -> static -> src -> xml -> website_sale_recently_viewed.xml (Odoo 14).

In that file, you can see a line:

<div class="d-block font-weight-bold" t-raw="product.price"/>

This is the code that adds price to the products in the snippet. You just have to remove it.

Regards