linux-thread-db.c initializes td_thr_validate but never uses it.
This commit removes this dead code.
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.
+2015-05-07  Gary Benson <gbenson@redhat.com>
+
+       * linux-thread-db.c (struct thread_db_info)
+       <td_thr_validate_p>: Remove field.
+       (try_thread_db_load_1): Remove initialization for the above.
+
 2015-05-06  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
        * compile/compile-object-load.c (compile_object_load): Support
 
   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,
   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;