remove unnecessary import

Author: wen-2018

tests/functional/conftest.py

@@ -2,7 +2,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
-import pytest
 import requests
 from pyquery import PyQuery as pq