Drop Python 2 (1/n): remove unicode string and url_utils

searx/engines/duden.py

@@ -10,9 +10,9 @@
 
 from lxml import html, etree
 import re
+from urllib.parse import quote, urljoin
 from searx.engines.xpath import extract_text
 from searx.utils import eval_xpath
-from searx.url_utils import quote, urljoin
 from searx import logger
 
 categories = ['general']