QArrayDataPointer: skip deallocate detour

We never made use of it since its introduction in 5.0, and calling free
directly reduces the size of libQtCore by roughly ~100kb.

Change-Id: I7dbdac83c82fa38d1833a4677fc83ebe809a11ef
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/tools/qarraydatapointer.h

@@ -92,7 +92,7 @@ public:
     {
         if (!deref()) {
             (*this)->destroyAll();
-            Data::deallocate(d);
+            free(d);
         }
     }