[OB][PATCH] Remove unused td_thr_validate code

[Gary Benson <gbenson@redhat.com>]

linux-thread-db.c initializes td_thr_validate but never uses it.
This commit removes this dead code.

Pushed as obvious.

gdb/ChangeLog:

	* linux-thread-db.c (struct thread_db_info)
	<td_thr_validate_p>: Remove field.
	(try_thread_db_load_1): Remove initialization for the above.
---
 gdb/ChangeLog         |    6 ++++++
 gdb/linux-thread-db.c |    5 -----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/gdb/linux-thread-db.c b/gdb/linux-thread-db.c
index 886d8ac..977476e 100644
--- a/gdb/linux-thread-db.c
+++ b/gdb/linux-thread-db.c
@@ -196,7 +196,6 @@ struct thread_db_info
   td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta,
 				    td_event_msg_t *msg);
 
-  td_err_e (*td_thr_validate_p) (const td_thrhandle_t *th);
   td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th,
 				 td_thrinfo_t *infop);
   td_err_e (*td_thr_event_enable_p) (const td_thrhandle_t *th,
@@ -736,10 +735,6 @@ try_thread_db_load_1 (struct thread_db_info *info)
   if (info->td_ta_thr_iter_p == NULL)
     return 0;
 
-  info->td_thr_validate_p = verbose_dlsym (info->handle, "td_thr_validate");
-  if (info->td_thr_validate_p == NULL)
-    return 0;
-
   info->td_thr_get_info_p = verbose_dlsym (info->handle, "td_thr_get_info");
   if (info->td_thr_get_info_p == NULL)
     return 0;
-- 
1.7.1