[glom/gtkmm4v3: 13/21] gtkmm4: Remove override from add() methods.

[Murray Cumming <murrayc src gnome org>]

commit 3cae0abbe6d050502ff959cc3f735d6afb76a1c4
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Mar 14 09:21:42 2017 +0100

    gtkmm4: Remove override from add() methods.

 glom/appwindow.h                         |    2 +-
 glom/utility_widgets/dialog_properties.h |    2 +-
 glom/utility_widgets/placeholder.h       |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/glom/appwindow.h b/glom/appwindow.h
index 9e1ca93..068b848 100644
--- a/glom/appwindow.h
+++ b/glom/appwindow.h
@@ -168,7 +168,7 @@ public:
   static AppWindow* get_appwindow();
 
   /// Overidden to add a widget in the middle, under the menu, instead of replacing the whole contents.
-  void add(Gtk::Widget& child) override;
+  void add(Gtk::Widget& child);
 
   /// For instance, to create bold primary text for a dialog box, without marking the markup for translation.
   static Glib::ustring util_bold_message(const Glib::ustring& message);
diff --git a/glom/utility_widgets/dialog_properties.h b/glom/utility_widgets/dialog_properties.h
index c3bff78..9ef3b9d 100644
--- a/glom/utility_widgets/dialog_properties.h
+++ b/glom/utility_widgets/dialog_properties.h
@@ -36,7 +36,7 @@ public:
   Dialog_Properties(BaseObjectType* cobject, const Glib::RefPtr<Gtk::Builder>& builder);
 
   //Add a widget (probably a container) to the top half of the dialog:
-  void add(Gtk::Widget& widget) override;
+  void add(Gtk::Widget& widget);
 
   virtual void set_modified(bool modified = true);
 
diff --git a/glom/utility_widgets/placeholder.h b/glom/utility_widgets/placeholder.h
index 094eca9..b28e1ef 100644
--- a/glom/utility_widgets/placeholder.h
+++ b/glom/utility_widgets/placeholder.h
@@ -35,7 +35,7 @@ public:
   PlaceHolder();
   PlaceHolder(BaseObjectType* cobject, const Glib::RefPtr<Gtk::Builder>& builder);
 
-  void add(Gtk::Widget& child) override;
+  void add(Gtk::Widget& child);
   void remove();
 
   Gtk::Widget* get_child();