no need to import concurrent.futures in parallel tests

JoshKarpel · JoshKarpel · commit be9f1ce30318 · 2020-04-14T16:23:16.000-05:00
diff --git a/tests/problems/test_parallel.py b/tests/problems/test_parallel.py
@@ -1,7 +1,6 @@
 import unittest
 
 import multiprocessing
-from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor
 
 import numpy as np
 
