TEST: Don't set mpl backend

ffa8fba3 · Paul McCarthy · 6f8f46ee · ffa8fba3
Commit ffa8fba3 authored Feb 19, 2021 by Paul McCarthy 🚵
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -23,9 +23,6 @@ import numpy   as np

 from six import StringIO

-import matplotlib as mpl
-mpl.use('WxAgg')  # noqa
-
 # python 3
 try:
    from unittest import mock