gtk: Drop unused buy_shell, rename_input from struct city_dialog
At least for gtk3.22-client struct city_dialog members buy_shell and rename_input are effectively unused (former gets initialized to NULL, and is sometimes checked for value other than NULL, but never gets any other value than NULL) Drop them.
At least for gtk3.22-client struct city_dialog members buy_shell and rename_input are effectively unused (former gets initialized to NULL, and is sometimes checked for value other than NULL, but never gets any other value than NULL) Drop them.