Generate Press remove excerpts from archive pages.

remove-excerpts-from-the-archive-pages-only.code-snippets.php

<?php

/**
 * Remove excerpts from the archive pages only
 * https://generatepress.com/forums/topic/remove-excerpt-from-the-archive-pages/#post-898902
 */

add_filter('wp_trim_excerpt', 'db_excerpt_metabox_remove');
function db_excerpt_metabox_remove($excerpt)
{
  $output = $excerpt;

  if (is_archive() && has_excerpt()) {
    $output = '';
  }

  return $output;
}