Remove unused enum values.

These were used for foreground/background color.
Since we have proper functions for these two now,
the hack with invoke_method is no longer needed.

Change-Id: I66eb645124caa838adb1ceb41383a2724a45f553
Reviewed-by: Jan-Arve Sæther <jan-arve.saether@nokia.com>

src/gui/accessible/qaccessible.h

@@ -287,9 +287,7 @@ public:
     enum Method {
         ListSupportedMethods      = 0,
         SetCursorPosition         = 1,
-        GetCursorPosition         = 2,
-        ForegroundColor           = 3,
-        BackgroundColor           = 4
+        GetCursorPosition         = 2
     };
 
     enum InterfaceType