[gcc r13-3783] ada: Remove unneeded code in handling formal type defaults

[Marc Poulhi?s <dkm@gcc.gnu.org>]

https://gcc.gnu.org/g:d96a20bf2ef939c0dd9d2bb32c59267842279c29

commit r13-3783-gd96a20bf2ef939c0dd9d2bb32c59267842279c29
Author: Piotr Trojanek <trojanek@adacore.com>
Date:   Tue Sep 6 23:20:47 2022 +0200

    ada: Remove unneeded code in handling formal type defaults
    
    Unneeded code found while experimenting with improved detection of
    unreferenced objects.
    
    gcc/ada/
    
            * sem_ch12.adb (Validate_Formal_Type_Default): Remove call to
            Collect_Interfaces, which had no effect apart from populating a
            list that was not used; fix style.

Diff:
---
 gcc/ada/sem_ch12.adb | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/gcc/ada/sem_ch12.adb b/gcc/ada/sem_ch12.adb
index 2b7833dfdcd..ca0f4913e36 100644
--- a/gcc/ada/sem_ch12.adb
+++ b/gcc/ada/sem_ch12.adb
@@ -17303,13 +17303,11 @@ package body Sem_Ch12 is
 
             else
                declare
-                  Act_Iface_List : Elist_Id;
-                  Iface          : Node_Id;
-                  Iface_Ent      : Entity_Id;
+                  Iface     : Node_Id;
+                  Iface_Ent : Entity_Id;
 
                begin
                   Iface := First (Abstract_Interface_List (Formal));
-                  Collect_Interfaces (Def_Sub, Act_Iface_List);
 
                   while Present (Iface) loop
                      Iface_Ent := Entity (Iface);