Remove Delete Tab from Primary Tabs Local Tasks Menu in Drupal

To remove the delete tab in Drupal 10.4.X on all nodes you can use this code in a custom module. 

<?php

use Drupal\Core\Url;

/**
 * Implements hook_menu_local_tasks_alter().
 */
function custom_theme_menu_local_tasks_alter(&$data, $route_name, $route_parameters) {
  // Check if we're on a node page.
  if (strpos($route_name, 'entity.node.') === 0 && !empty($data['tabs'])) {
    foreach ($data['tabs'] as $group => &$tab_set) {
      foreach ($tab_set as $key => &$tab) {
        $url = $tab['#link']['url'] ?? NULL;
        if ($url instanceof Url && $url->getRouteName() === 'entity.node.delete_form') {
          unset($tab_set[$key]);
        }
      }
      // Re-index the array to avoid gaps.
      $tab_set = array_values($tab_set);
    }
  }
}