Remove reference to ignored rcParam, nbagg.transparent

efiring · efiring · commit 7d8c441cc7f0 · 2018-01-15T13:53:09.000-10:00
In #10024, rcParams['nbagg.transparent'] was marked as deprecated and ignored, but it was not removed from backend_nbagg. As a result, every plot made with backend_nbagg was raising a warning. This PR finishes #10024 by removing the reference and the line that depends on it.
diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
@@ -234,8 +234,6 @@ class _BackendNbAgg(_Backend):
     @staticmethod
     def new_figure_manager_given_figure(num, figure):
         canvas = FigureCanvasNbAgg(figure)
-        if rcParams['nbagg.transparent']:
-            figure.patch.set_alpha(0)
         manager = FigureManagerNbAgg(canvas, num)
         if is_interactive():
             manager.show()
