Remove no longer existing example from backend_driver

jenshnielsen · jenshnielsen · commit db3316a33e1c · 2016-06-15T07:48:07.000+01:00
diff --git a/examples/tests/backend_driver.py b/examples/tests/backend_driver.py
@@ -202,7 +202,6 @@
     'masked_demo.py',
     'mathtext_demo.py',
     'mathtext_examples.py',
-    'matplotlib_icon.py',
     'matshow.py',
     'mri_demo.py',
     'mri_with_eeg.py',
