Removes a widget from the list of mnemonic labels for this widget. (See gtk.widget.Widget.listMnemonicLabels). The widget must have previously been added to the list with gtk.widget.Widget.addMnemonicLabel.
a #GtkWidget that was previously set as a mnemonic label for widget with gtk.widget.Widget.addMnemonicLabel.
Removes a widget from the list of mnemonic labels for this widget. (See gtk.widget.Widget.listMnemonicLabels). The widget must have previously been added to the list with gtk.widget.Widget.addMnemonicLabel.