remove call to undefined method refresh_headers

electrum/gui/qt/history_list.py

@@ -363,9 +363,6 @@ class HistoryList(MyTreeView, AcceptFileDragDrop):
     def format_date(self, d):
         return str(datetime.date(d.year, d.month, d.day)) if d else _('None')
 
-    def update_headers(self, headers):
-        raise NotImplementedError
-
     def on_combo(self, x):
         s = self.period_combo.itemText(x)
         x = s == _('Custom')

electrum/gui/qt/main_window.py

@@ -2667,7 +2667,6 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
         b = self.fx and self.fx.is_enabled()
         self.fiat_send_e.setVisible(b)
         self.fiat_receive_e.setVisible(b)
-        self.history_list.refresh_headers()
         self.history_list.update()
         self.address_list.refresh_headers()
         self.address_list.update()