[gtkmm/remove-functions] Gtk::ColumnViewColumn: simplify constructors

[Andreas Persson <andreasp src gnome org>]

commit 6543bc3c67f2bca14a76f3f3fdb3b92b338d0289
Author: Andreas Persson <andreasp56 outlook com>
Date:   Sat Sep 26 09:40:04 2020 +0200

    Gtk::ColumnViewColumn: simplify constructors
    
    The GTK column_view_column constructors have been simplified.

 gtk/src/columnviewcolumn.hg | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/gtk/src/columnviewcolumn.hg b/gtk/src/columnviewcolumn.hg
index 8b836c55..f0ee41c6 100644
--- a/gtk/src/columnviewcolumn.hg
+++ b/gtk/src/columnviewcolumn.hg
@@ -45,13 +45,10 @@ class GTKMM_API ColumnViewColumn : public Glib::Object
   _CLASS_GOBJECT(ColumnViewColumn, GtkColumnViewColumn, GTK_COLUMN_VIEW_COLUMN, Glib::Object, GObject, , , 
GTKMM_API)
 
 protected:
-  _WRAP_CTOR(ColumnViewColumn(const Glib::ustring& title), gtk_column_view_column_new)
-  _WRAP_CTOR(ColumnViewColumn(const Glib::ustring& title, const Glib::RefPtr<ListItemFactory>& factory),
-    gtk_column_view_column_new_with_factory)
+  _WRAP_CTOR(ColumnViewColumn(const Glib::ustring& title, const Glib::RefPtr<ListItemFactory>& factory = 
{}), gtk_column_view_column_new)
 
 public:
-  _WRAP_CREATE(const Glib::ustring& title)
-  _WRAP_CREATE(const Glib::ustring& title, const Glib::RefPtr<ListItemFactory>& factory)
+  _WRAP_CREATE(const Glib::ustring& title, const Glib::RefPtr<ListItemFactory>& factory = {})
 
 #m4 _CONVERSION(`GtkColumnView*',`ColumnView*',__RP2P)
   _WRAP_METHOD(ColumnView* get_column_view(), gtk_column_view_column_get_column_view)