kernel32: Exclude unused headers.

dlls/kernel32/system.c

@@ -24,7 +24,6 @@
 
 #include "windef.h"
 #include "winbase.h"
-#include "wingdi.h"
 #include "wine/winbase16.h"
 #include "wine/winuser16.h"
 #include "wownt32.h"

dlls/kernel32/thread.c

@@ -34,7 +34,6 @@
 #include "windef.h"
 #include "winbase.h"
 #include "winerror.h"
-#include "winnls.h"
 #include "thread.h"
 #include "wine/winbase16.h"
 #include "wine/exception.h"

dlls/kernel32/toolhelp16.c

@@ -31,7 +31,6 @@
 #include "windef.h"
 #include "winbase.h"
 #include "winternl.h"
-#include "winerror.h"
 
 #include "wine/winbase16.h"
 #include "toolhelp.h"

dlls/kernel32/virtual.c

@@ -40,7 +40,6 @@
 #include "winternl.h"
 #include "winerror.h"
 #include "wine/exception.h"
-#include "excpt.h"
 #include "wine/debug.h"
 
 #include "kernel_private.h"

dlls/kernel32/volume.c

@@ -36,7 +36,6 @@
 #include "winnls.h"
 #include "winternl.h"
 #include "winioctl.h"
-#include "ntddstor.h"
 #include "ntddcdrm.h"
 #include "kernel_private.h"
 #include "wine/library.h"

dlls/kernel32/windebug.c

@@ -22,7 +22,6 @@
 #include <string.h>
 #include <stdlib.h>
 #include "windef.h"
-#include "winbase.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(dll);