Remove duplicate canvas assignments.

anntzer · anntzer · commit ca2640871a6e · 2020-04-15T10:20:16.000+02:00
These `self.canvas = canvas` are already being done by the base class
init.
diff --git a/lib/matplotlib/backends/_backend_tk.py b/lib/matplotlib/backends/_backend_tk.py
@@ -412,7 +412,6 @@ def __init__(self, canvas, num, window):
         self.window = window
         self.window.withdraw()
         self.set_window_title("Figure %d" % num)
-        self.canvas = canvas
         # If using toolmanager it has to be present when initializing the
         # toolbar
         self.toolmanager = self._get_toolmanager()
@@ -502,7 +501,6 @@ class NavigationToolbar2Tk(NavigationToolbar2, tk.Frame):
         ``pack_toolbar=False``.
     """
     def __init__(self, canvas, window, *, pack_toolbar=True):
-        self.canvas = canvas
         # Avoid using self.window (prefer self.canvas.get_tk_widget().master),
         # so that Tool implementations can reuse the methods.
         self.window = window
diff --git a/lib/matplotlib/backends/backend_qt5.py b/lib/matplotlib/backends/backend_qt5.py
@@ -516,7 +516,6 @@ class FigureManagerQT(FigureManagerBase):
 
     def __init__(self, canvas, num):
         FigureManagerBase.__init__(self, canvas, num)
-        self.canvas = canvas
         self.window = MainWindow()
         self.window.closing.connect(canvas.close_event)
         self.window.closing.connect(self._widgetclosed)
diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -1110,7 +1110,6 @@ class NavigationToolbar2Wx(NavigationToolbar2, wx.ToolBar):
     def __init__(self, canvas):
         wx.ToolBar.__init__(self, canvas.GetParent(), -1)
         NavigationToolbar2.__init__(self, canvas)
-        self.canvas = canvas
         self._idle = True
         self.prevZoomRect = None
         # for now, use alternate zoom-rectangle drawing on all
