[binutils-gdb] Remove infrun_thread_thread_exit observer

[Pedro Alves <palves@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=9b955acd7f5029345e7bd8e31a4af0e6b356f0ae

commit 9b955acd7f5029345e7bd8e31a4af0e6b356f0ae
Author: Pedro Alves <pedro@palves.net>
Date:   Wed Nov 16 17:01:44 2022 +0000

    Remove infrun_thread_thread_exit observer
    
    After the previous patches, I believe this observer isn't necessary
    anymore for anything.  Remove it.
    
    Change-Id: Idb33fb6b6f55589c8c523a92169b3ca95a23d0b9

Diff:
---
 gdb/infrun.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/gdb/infrun.c b/gdb/infrun.c
index beb9ca79389..79e1a6abd2a 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -3606,14 +3606,6 @@ infrun_thread_stop_requested (ptid_t ptid)
     }
 }
 
-static void
-infrun_thread_thread_exit (struct thread_info *tp, int silent)
-{
-  if (target_last_proc_target == tp->inf->process_target ()
-      && target_last_wait_ptid == tp->ptid)
-    nullify_last_target_wait_ptid ();
-}
-
 /* Delete the step resume, single-step and longjmp/exception resume
    breakpoints of TP.  */
 
@@ -10023,7 +10015,6 @@ enabled by default on some platforms."),
 					      "infrun");
   gdb::observers::thread_stop_requested.attach (infrun_thread_stop_requested,
 						"infrun");
-  gdb::observers::thread_exit.attach (infrun_thread_thread_exit, "infrun");
   gdb::observers::inferior_exit.attach (infrun_inferior_exit, "infrun");
   gdb::observers::inferior_execd.attach (infrun_inferior_execd, "infrun");