First, please do not use links inthe topic title, but explain the main issue. Other members would find your topic if they have the same problem.
For that block, first check the Search template settings in theme customizer.
But that looks like a search for products, found a list of posts that have a search term.
And I am not sure if yo ucan disable Posts/Articles in some setting.
But if no luck, with CSS, you can hide it, but it will still be in the code. Try first in Search results section, on Search page in Theme customizer, under sections Custom css to use code below
and it will hide it. The first option is better because it is safe to update your theme and you do not lose custom code.
Instead of a CSS solution, you can search for productgrid--footer in theme editor and remove that block, but again, that could cause issues with theme update in the future.