Remove nav walker and Bootstrap navbar

lib/utils.php

@@ -11,38 +11,3 @@ function get_search_form() {
   return $form;
 }
 add_filter('get_search_form', __NAMESPACE__ . '\\get_search_form');
-
-/**
- * Make a URL relative
- */
-function root_relative_url($input) {
-  preg_match('|https?://([^/]+)(/.*)|i', $input, $matches);
-  if (!isset($matches[1]) || !isset($matches[2])) {
-    return $input;
-  } elseif (($matches[1] === $_SERVER['SERVER_NAME']) || $matches[1] === $_SERVER['SERVER_NAME'] . ':' . $_SERVER['SERVER_PORT']) {
-    return wp_make_link_relative($input);
-  } else {
-    return $input;
-  }
-}
-
-/**
- * Compare URL against relative URL
- */
-function url_compare($url, $rel) {
-  $url = trailingslashit($url);
-  $rel = trailingslashit($rel);
-  if ((strcasecmp($url, $rel) === 0) || root_relative_url($url) == $rel) {
-    return true;
-  } else {
-    return false;
-  }
-}
-
-/**
- * Check if element is empty
- */
-function is_element_empty($element) {
-  $element = trim($element);
-  return !empty($element);
-}