[gimp/gimp-2-10] Fix build on Windows by removing include of a missing header file

[Luca Bacci <lbacci src gnome org>]

commit 11e063e41632b6cca6018ef8420825486816c23d
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Tue Oct 11 15:03:59 2022 +0200

    Fix build on Windows by removing include of a missing header file
    
    That was a mistake made when backporting a feature from GIMP3,
    see https://gitlab.gnome.org/GNOME/gimp/-/merge_requests/755

 libgimpwidgets/gimppickbutton-win32.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/libgimpwidgets/gimppickbutton-win32.c b/libgimpwidgets/gimppickbutton-win32.c
index e87dd56e49..d5ca8b7358 100644
--- a/libgimpwidgets/gimppickbutton-win32.c
+++ b/libgimpwidgets/gimppickbutton-win32.c
@@ -23,7 +23,6 @@
 
 #include "gimpwidgetstypes.h"
 #include "gimppickbutton.h"
-#include "gimppickbutton-private.h"
 #include "gimppickbutton-win32.h"
 
 #include <sdkddkver.h>