Don't force backend in toolmanager example.

anntzer · anntzer · commit 0367572abc2c · 2018-07-18T17:19:22.000+02:00
This allows one to set the backend from the matplotlibrc or the
MPLBACKEND environment variable.
diff --git a/examples/user_interfaces/toolmanager_sgskip.py b/examples/user_interfaces/toolmanager_sgskip.py
@@ -13,15 +13,8 @@
 Using `matplotlib.backend_managers.ToolManager`
 """
 
-
-import matplotlib
-# Change to the desired backend
-matplotlib.use('GTK3Cairo')
-# matplotlib.use('TkAgg')
-# matplotlib.use('QT5Agg')
-# matplotlib.use('WxAgg')
-matplotlib.rcParams['toolbar'] = 'toolmanager'
 import matplotlib.pyplot as plt
+plt.rcParams['toolbar'] = 'toolmanager'
 from matplotlib.backend_tools import ToolBase, ToolToggleBase
 
 
