MNT: do not make unneeded copy

tacaswell · tacaswell · commit 3cada628f559 · 2016-05-16T15:44:26.000-04:00
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
@@ -270,7 +270,6 @@ def _setdefaults(self, defaults, *kwargs):
 
     def _makeline(self, x, y, kw, kwargs):
         kw = kw.copy()  # Don't modify the original kw.
-        kwargs = kwargs.copy()
         kw.update(kwargs)
         default_dict = self._getdefaults(None, kw)
         self._setdefaults(default_dict, kw)
