When You want to remove copyrights note from the prestashop 1.7.x classic template, you have to open file


then removie lines 47-51

{block name='copyright_link'}
<a class="_blank" href="http://www.prestashop.com" target="_blank">
{l s='%copyright% %year% - Ecommerce software by %prestashop%' sprintf=['%prestashop%' => 'PrestaShop™', '%year%' => 'Y'|date, '%copyright%' => '©'] d='Shop.Theme.Global'}

Empty block should look like this:

 <div class="row">
      <div class="col-md-12">
        <p class="text-sm-center">

You can removie it too or leave it to place other informations.

Dont forgat to change Performance-> template compilation -> Recompile templates if the files have been updated to update changes in the template.