Remove a duplicate attribute setting.

anntzer · anntzer · commit 41d8fbc4ff4a · 2019-01-03T22:31:08.000+01:00
`self.figure.dpi` is already set to `dpi` by the `_setattr_cm`
contextmanager a few lines earlier.
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
@@ -1991,7 +1991,6 @@ def print_figure(self, filename, dpi=None, facecolor=None, edgecolor=None,
             origfacecolor = self.figure.get_facecolor()
             origedgecolor = self.figure.get_edgecolor()
 
-            self.figure.dpi = dpi
             self.figure.set_facecolor(facecolor)
             self.figure.set_edgecolor(edgecolor)
 
