DOC: Remove duplicated line.

QuLogic · QuLogic · commit f6a56f8aa0ee · 2020-06-10T18:45:37.000-04:00
This was added in #14714, and then backported in #14822 to `v3.1.x`, and a merge up must have accidentally included both. Fixes #17613.
diff --git a/tutorials/introductory/usage.py b/tutorials/introductory/usage.py
@@ -402,9 +402,6 @@ def my_plotter(ax, data1, data2, param_dict):
 # To save plots using the non-interactive backends, use the
 # ``matplotlib.pyplot.savefig('filename')`` method.
 #
-# To save plots using the non-interactive backends, use the
-# ``matplotlib.pyplot.savefig('filename')`` method.
-#
 # And here are the user interfaces and renderer combinations supported;
 # these are *interactive backends*, capable of displaying to the screen
 # and of using appropriate renderers from the table above to write to
