[Ada] Remove obsolete comment

[Eric Botcazou]

I forgot to remove it when I removed the associated code back in June.

Tested on x86_64-suse-linux, applied on the mainline and 4.8 branch.


2013-10-13  Eric Botcazou  <ebotca...@adacore.com>

        * gcc-interface/decl.c (gnat_to_gnu_param): Remove obsolete comment.


-- 
Eric Botcazou
Index: gcc-interface/decl.c
===================================================================
--- gcc-interface/decl.c	(revision 203486)
+++ gcc-interface/decl.c	(working copy)
@@ -5824,12 +5824,8 @@ gnat_to_gnu_param (Entity_Id gnat_param,
 				 ro_param || by_ref || by_component_ptr);
   DECL_BY_REF_P (gnu_param) = by_ref;
   DECL_BY_COMPONENT_PTR_P (gnu_param) = by_component_ptr;
-  DECL_BY_DESCRIPTOR_P (gnu_param) = (mech == By_Descriptor ||
-                                      mech == By_Short_Descriptor);
-  /* Note that, in case of a parameter passed by double reference, the
-     DECL_POINTS_TO_READONLY_P flag is meant for the second reference.
-     The first reference always points to read-only, as it points to
-     the second reference, i.e. the reference to the actual parameter.  */
+  DECL_BY_DESCRIPTOR_P (gnu_param)
+    = (mech == By_Descriptor || mech == By_Short_Descriptor);
   DECL_POINTS_TO_READONLY_P (gnu_param)
     = (ro_param && (by_ref || by_component_ptr));
   DECL_CAN_NEVER_BE_NULL_P (gnu_param) = Can_Never_Be_Null (gnat_param);