Deactivate pictures

You will have to edit the file "listing_table" of the view "product" via the menu Display->Views and add the code below after the first <?php tag :
$this->config->set('thumbnail',false);

Everything is possible if you code it...
Can you give more information ? Like a link to the page ?

I got it now.

At the end of that file, you should also add the line:
$this->config->set('thumbnail',true);

so that thumbnails are reactivated after the display of the table.

Then I don't know.

I mean, that ought to work... If it doesn't it's probably that the modification is not done as it should.
Otherwise, there are several other ways to remove the image... You could just remove the corresponding code in that view for example...