qedaemon: remove redundant, small code style fixes

electrum/gui/qml/qedaemon.py

@@ -160,10 +160,6 @@ class QEDaemon(AuthMixin, QObject):
         if not self._walletdb._validPassword:
             self.walletRequiresPassword.emit(self._name, self._path)
 
-    @pyqtSlot(str)
-    def onWalletOpenProblem(self, error):
-        self.walletOpenError.emit(error)
-
     @pyqtSlot()
     @pyqtSlot(str)
     @pyqtSlot(str, str)