ALL: Remove unnecessary forward declarations.

backends/platform/ps2/Gs2dScreen.h

@@ -42,10 +42,6 @@ enum GsInterlace {
 };
 
 
-namespace Graphics {
-struct Surface;
-}
-
 class Gs2dScreen {
 public:
 	Gs2dScreen(uint16 width, uint16 height, TVMode tvMode);

engines/kyra/kyra_lok.h

@@ -29,10 +29,6 @@
 #include "kyra/gui_lok.h"
 #include "kyra/item.h"
 
-namespace Graphics {
-struct Surface;
-}
-
 namespace Kyra {
 
 class Movie;

engines/lastexpress/data/scene.h

@@ -76,10 +76,6 @@ class SeekableReadStream;
 class String;
 }
 
-namespace Graphics {
-struct Surface;
-}
-
 namespace LastExpress {
 
 class Scene;

engines/teenagent/surface.h

@@ -31,7 +31,6 @@ class SeekableReadStream;
 
 namespace TeenAgent {
 
-class Pack;
 class Surface : public Graphics::Surface {
 public:
 	enum Type {kTypeOns, kTypeLan};

graphics/yuv_to_rgb.h

@@ -35,8 +35,6 @@
 
 namespace Graphics {
 
-struct Surface;
-
 /**
  * Convert a YUV420 image to an RGB surface
  *

video/avi_decoder.h

@@ -43,10 +43,6 @@ namespace Graphics {
 struct PixelFormat;
 }
 
-namespace Graphics {
-struct Surface;
-}
-
 namespace Video {
 
 class Codec;

video/codecs/cinepak.h

@@ -33,10 +33,6 @@ namespace Common {
 class SeekableReadStream;
 }
 
-namespace Graphics {
-struct Surface;
-}
-
 namespace Video {
 
 struct CinepakCodebook {

video/codecs/mjpeg.h

@@ -32,7 +32,6 @@ class SeekableReadStream;
 
 namespace Graphics {
 class JPEG;
-struct Surface;
 }
 
 namespace Video {

video/dxa_decoder.h

@@ -31,10 +31,6 @@ namespace Common {
 class SeekableReadStream;
 }
 
-namespace Graphics {
-struct Surface;
-}
-
 namespace Video {
 
 /**