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

searx/engines/duckduckgo.py

@@ -15,9 +15,9 @@
 
 from lxml.html import fromstring
 from json import loads
+from urllib.parse import urlencode
 from searx.engines.xpath import extract_text
 from searx.poolrequests import get
-from searx.url_utils import urlencode
 from searx.utils import match_language, eval_xpath
 
 # engine dependent config