Get rid of unused constructors

src/rugby-list-store.c

 /*
- * SPDX-FileCopyrightText: 2018-2021 Bruce Cowan <bruce@bcowan.me.uk>
+ * SPDX-FileCopyrightText: 2018-2022 Bruce Cowan <bruce@bcowan.me.uk>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
@@ -241,9 +241,3 @@ rugby_list_store_set_score (RugbyListStore *self,
         g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SCORE]);
     }
 }
-
-RugbyListStore *
-rugby_list_store_new (void)
-{
-    return g_object_new (RUGBY_TYPE_LIST_STORE, NULL);
-}

src/rugby-list-store.h

 /*
- * SPDX-FileCopyrightText: 2018 Bruce Cowan <bruce@bcowan.me.uk>
+ * SPDX-FileCopyrightText: 2018-2022 Bruce Cowan <bruce@bcowan.me.uk>
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
@@ -12,8 +12,6 @@ G_BEGIN_DECLS
 #define RUGBY_TYPE_LIST_STORE (rugby_list_store_get_type())
 G_DECLARE_FINAL_TYPE (RugbyListStore, rugby_list_store, RUGBY, LIST_STORE, GObject)
 
-RugbyListStore * rugby_list_store_new       (void);
-
 int              rugby_list_store_get_score (RugbyListStore *self);
 void             rugby_list_store_set_score (RugbyListStore *self,
                                              int             score);

src/rugby-possibility-widget.c

 /*
- * SPDX-FileCopyrightText: 2018-2021 Bruce Cowan <bruce@bcowan.me.uk>
+ * SPDX-FileCopyrightText: 2018-2022 Bruce Cowan <bruce@bcowan.me.uk>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
@@ -180,11 +180,3 @@ rugby_possibility_widget_init (RugbyPossibilityWidget *self)
 {
     self->settings = g_settings_new ("uk.me.bcowan.Rugby");
 }
-
-GtkWidget *
-rugby_possibility_widget_new (RugbyPossibility *possibility)
-{
-    return g_object_new (RUGBY_TYPE_POSSIBILITY_WIDGET,
-                         "possibility", possibility,
-                         NULL);
-}

src/rugby-possibility-widget.h

 /*
- * SPDX-FileCopyrightText: 2018-2021 Bruce Cowan <bruce@bcowan.me.uk>
+ * SPDX-FileCopyrightText: 2018-2022 Bruce Cowan <bruce@bcowan.me.uk>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
@@ -16,6 +16,4 @@ G_BEGIN_DECLS
 
 G_DECLARE_FINAL_TYPE (RugbyPossibilityWidget, rugby_possibility_widget, RUGBY, POSSIBILITY_WIDGET, GtkWidget)
 
-GtkWidget * rugby_possibility_widget_new (RugbyPossibility *possibility);
-
 G_END_DECLS