Remove note about source-incompatible change.

There's no real gain to be had from doing this.

Change-Id: Ifa5fefe4a354cfe1f9a8a915a7041d0cfebccce1
Reviewed-by: Jonas Gastal <jgastal@profusion.mobi>
Reviewed-by: Richard J. Moore <rich@kde.org>

src/widgets/dialogs/qfiledialog.h

@@ -85,7 +85,6 @@ public:
     enum AcceptMode { AcceptOpen, AcceptSave };
     enum DialogLabel { LookIn, FileName, FileType, Accept, Reject };
 
-    // ### Rename to FileDialogOption and FileDialogOptions for Qt 5.0
     enum Option
     {
         ShowDirsOnly          = 0x00000001,