gdi32: Exclude unused headers

[Andrew Talbot]

Changelog:
    gdi32: Exclude unused headers.

diff -urN a/dlls/gdi32/bidi16.c b/dlls/gdi32/bidi16.c
--- a/dlls/gdi32/bidi16.c	2006-10-20 14:01:36.000000000 +0100
+++ b/dlls/gdi32/bidi16.c	2007-05-03 14:56:19.000000000 +0100
@@ -22,7 +22,6 @@
 #include <stdarg.h>
 
 #include "windef.h"
-#include "winbase.h"
 #include "wine/wingdi16.h"
 #include "wine/debug.h"
 
diff -urN a/dlls/gdi32/bidi.c b/dlls/gdi32/bidi.c
--- a/dlls/gdi32/bidi.c	2006-11-17 17:51:14.000000000 +0000
+++ b/dlls/gdi32/bidi.c	2007-05-03 14:56:28.000000000 +0100
@@ -27,8 +27,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
-#include "wingdi.h"
 #include "wine/debug.h"
 #include "gdi_private.h"
 
diff -urN a/dlls/gdi32/dc.c b/dlls/gdi32/dc.c
--- a/dlls/gdi32/dc.c	2007-04-17 17:42:53.000000000 +0100
+++ b/dlls/gdi32/dc.c	2007-05-03 14:56:38.000000000 +0100
@@ -26,7 +26,6 @@
 #include "windef.h"
 #include "winbase.h"
 #include "wingdi.h"
-#include "winreg.h"
 #include "winternl.h"
 #include "winerror.h"
 #include "wownt32.h"
diff -urN a/dlls/gdi32/dispdib.c b/dlls/gdi32/dispdib.c
--- a/dlls/gdi32/dispdib.c	2006-10-20 14:01:36.000000000 +0100
+++ b/dlls/gdi32/dispdib.c	2007-05-03 14:56:50.000000000 +0100
@@ -21,7 +21,6 @@
 #include <stdarg.h>
 #include <string.h>
 #include "windef.h"
-#include "winbase.h"
 #include "wingdi.h"
 #include "wine/wingdi16.h"
 #include "dispdib.h"