[gtkmm] gdk/src/types.hg: Remove some forward declarations

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 092396b1e5812094b4af0bac60c4b1f6d022e7f4
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Thu Jun 1 15:19:46 2017 +0200

    gdk/src/types.hg: Remove some forward declarations
    
    Gdk::Font and Gdk::Color does not exist any more. Remove forward
    declarations of them.

 gdk/src/types.hg |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gdk/src/types.hg b/gdk/src/types.hg
index 7cb7d6a..74edcb3 100644
--- a/gdk/src/types.hg
+++ b/gdk/src/types.hg
@@ -53,8 +53,6 @@ namespace Gdk
 {
 
 class Window;
-class Font;
-class Color;
 
 _WRAP_ENUM(ByteOrder, GdkByteOrder)
 _WRAP_ENUM(ModifierType, GdkModifierType)