remove unused Link<> field

Change-Id: I121f133513a9897f38bd87be96c2cea39fbfc836

include/vcl/btndlg.hxx

@@ -91,7 +91,6 @@ private:
     sal_uInt16          mnCurButtonId;
     sal_uInt16          mnFocusButtonId;
     bool                mbFormat;
-    Link<>              maClickHdl;
 
     SAL_DLLPRIVATE void             ImplInitButtonDialogData();
     SAL_DLLPRIVATE VclPtr<PushButton> ImplCreatePushButton( ButtonDialogFlags nBtnFlags );

vcl/source/window/btndlg.cxx

@@ -260,13 +260,8 @@ void ButtonDialog::StateChanged( StateChangedType nType )
 
 void ButtonDialog::Click()
 {
-    if ( !maClickHdl )
-    {
     if ( IsInExecute() )
         EndDialog( GetCurButtonId() );
-    }
-    else
-        maClickHdl.Call( this );
 }
 
 void ButtonDialog::AddButton( const OUString& rText, sal_uInt16 nId,