ISTWCMS-5878 Remove taxonomy.inc file which is related to gesso only

includes/taxonomy.inc

-<?php
-
-/**
- * @file
- * Functions for fixing taxonomies.
- */
-
-/**
- * Implements theme_suggestions_taxonomy_term_alter()
- */
-function gesso_theme_suggestions_taxonomy_term_alter(array &$suggestions, array $variables) {
-  $bundle = $variables['elements']['name']['#bundle'];
-  $view_mode = $variables['elements']['#view_mode'];
-  $suggestions[] = 'taxonomy_term__' . $view_mode;
-  $suggestions[] = 'taxonomy_term__' . $bundle . '__' . $view_mode;
-}