Enable widgets for editor role

$role_object = get_role( 'editor' );

  //print_r($role_objec);

  // add $cap capability to this role object

  $role_object->add_cap( 'edit_theme_options' );
function custom_admin_menu() {
 $user = new WP_User(get_current_user_id()); 

  if (!empty( $user->roles) && is_array($user->roles)) {

  foreach ($user->roles as $role)

  $role = $role;

  }
 if($role == "editor") { 

  remove_submenu_page( 'themes.php', 'themes.php' );

  remove_submenu_page( 'themes.php', 'nav-menus.php' );

  remove_submenu_page( 'themes.php', 'theme_options' );

  remove_submenu_page( 'themes.php', 'custom-header' ); 

  } 

  }
add_action('admin_menu', 'custom_admin_menu', 11);