Remove the theme_menu_link override. (Moved to subtheme)

template.php

@@ -775,39 +775,6 @@ function borg_menu_tree__user_menu($variables) {
   return $output;
 }
 
-/**
- * Overrides theme_menu_link().
- */
-function borg_menu_link(array $variables) {
-  $element = $variables['element'];
-  $sub_menu = '';
-
-  if ($element['#below']) {
-    $sub_menu = backdrop_render($element['#below']);
-  }
-
-  $menu_name = isset($element['#original_link']['menu_name']) ? $element['#original_link']['menu_name'] : NULL;
-  if ($menu_name === 'main-menu' || $menu_name === 'menu-handbook') {
-    // If this is the handbook link and we're on a book page, set an active class.
-    if ($element['#href'] === 'node/1') {
-      $node = menu_get_object();
-      if (isset($node) && isset($node->type) && $node->type === 'book') {
-        $element['#attributes']['class'][] = 'active';
-      }
-    }
-  }
-
-  if ($menu_name === 'main-menu' && ($element['#href'] == 'https://forum.backdropcms.org' ||
-      $element['#href'] == 'https://api.backdropcms.org')) {
-    $title = check_plain($element['#title']);
-    $element['#title'] = $title . ' <i class="fa fa-external-link" aria-hidden="true"></i>';
-    $element['#localized_options']['html'] = TRUE;
-  }
-
-  $output = l($element['#title'], $element['#href'], $element['#localized_options']);
-  return '<li' . backdrop_attributes($element['#attributes']) . '>' . $output . $sub_menu . "</li>\n";
-}
-
 /**
  * Overrides theme_feed_icon().
  */