Little flake8 cleanup

Author: wolph

tests/test_dill_pickle.py

@@ -1,17 +1,15 @@
-import pickle
-
 import dill
 
 import progressbar
 
 
 def test_dill():
     bar = progressbar.ProgressBar()
-    assert bar._started == False
-    assert bar._finished == False
+    assert bar._started is False
+    assert bar._finished is False
 
-    assert not dill.pickles(bar)
+    assert dill.pickles(bar) is False
 
-    assert bar._started == False
+    assert bar._started is False
     # Should be false because it never should have started/initialized
-    assert bar._finished == False
+    assert bar._finished is False

tests/test_wrappingio.py

@@ -1,5 +1,4 @@
 import io
-import os
 import sys
 
 import pytest