kivy: remove redundant declaration

electrum/gui/kivy/uix/dialogs/__init__.py

@@ -81,9 +81,6 @@ class EventsDialog(Factory.Popup):
     def on_press(self, instance):
         pass
 
-    def close(self):
-        self.dismiss()
-
 
 class SelectionDialog(EventsDialog):
 

electrum/gui/kivy/uix/dialogs/installwizard.py

@@ -641,7 +641,7 @@ class WizardDialog(EventsDialog):
 
     def on_release(self, button):
         self._on_release = True
-        self.close()
+        self.dismiss()
         if not button:
             self.wizard.terminate(aborted=True)
             return