drop unneeded header

Change-Id: I0f4e31af807ea3a7771db81f1514a7ebdd1f7f7e
Reviewed-on: https://gerrit.libreoffice.org/19101Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>

vcl/osx/a11yrolehelper.h

@@ -20,7 +20,6 @@
 #ifndef INCLUDED_VCL_OSX_A11YROLEHELPER_H
 #define INCLUDED_VCL_OSX_A11YROLEHELPER_H
 
-#include "osx/salinst.h"
 #include <com/sun/star/accessibility/XAccessibleContext.hpp>
 
 @interface AquaA11yRoleHelper : NSObject