Fixed flake8 issue

MSeal · MSeal · commit 2be7ee22c6c0 · 2020-03-30T13:33:33.000-07:00
diff --git a/nbclient/tests/test_client.py b/nbclient/tests/test_client.py
@@ -27,7 +27,7 @@
 from pebble import ProcessPool
 
 from queue import Empty
-from unittest.mock import MagicMock, Mock, patch
+from unittest.mock import MagicMock, Mock
 
 
 addr_pat = re.compile(r'0x[0-9a-f]{7,9}')
