Kill Axes._connected.

anntzer · anntzer · commit 8fe140f2f682 · 2019-03-04T23:28:04.000+01:00
It's unused since 3bddca5 (2008).
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
@@ -492,7 +492,6 @@ def __init__(self, fig, rect,
         self.set_axisbelow(rcParams['axes.axisbelow'])
 
         self._rasterization_zorder = None
-        self._connected = {}  # a dict from events to (id, func)
         self.cla()
 
         # funcs used to format x and y - fall back on major formatters
