gdb: remove end_stepping_range observable

I noticed that this observable was never notified, which means we can
probably safely remove it.  The notification was removed in:

    commit 243a925328f8e3184b2356bee497181049c0174f
    Author: Pedro Alves <palves@redhat.com>
    Date:   Wed Sep 9 18:23:24 2015 +0100

        Replace "struct continuation" mechanism by something more extensible

print_end_stepping_range_reason in turn becomes unused, so remote it as
well.

Change-Id: If5da5149276c282d2540097c8c4327ce0f70431a

6 files changed, 0 insertions, 57 deletions

diff --git a/gdb/cli/cli-interp.c b/gdb/cli/cli-interp.c
index 9941014..5a515c6 100644
--- a/gdb/cli/cli-interp.c
+++ b/gdb/cli/cli-interp.c
@@ -151,21 +151,6 @@ cli_base_on_signal_received (enum gdb_signal siggnal)
     }
 }
 
-/* Observer for the end_stepping_range notification.  */
-
-static void
-cli_base_on_end_stepping_range ()
-{
-  SWITCH_THRU_ALL_UIS ()
-    {
-      cli_interp_base *cli = as_cli_interp_base (top_level_interpreter ());
-      if (cli == nullptr)
-	continue;
-
-      print_end_stepping_range_reason (cli->interp_ui_out ());
-    }
-}
-
 /* Observer for the signalled notification.  */
 
 static void
@@ -422,8 +407,6 @@ _initialize_cli_interp ()
   /* Note these all work for both the CLI and TUI interpreters.  */
   gdb::observers::normal_stop.attach (cli_base_on_normal_stop,
 				      "cli-interp-base");
-  gdb::observers::end_stepping_range.attach (cli_base_on_end_stepping_range,
-					     "cli-interp-base");
   gdb::observers::signal_received.attach (cli_base_on_signal_received,
 					  "cli-interp-base");
   gdb::observers::signal_exited.attach (cli_base_on_signal_exited,
diff --git a/gdb/infrun.c b/gdb/infrun.c
index b79642e..2f1c6cd 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -8499,18 +8499,6 @@ end_stepping_range (struct execution_control_state *ecs)
    with whatever uiout is right.  */
 
 void
-print_end_stepping_range_reason (struct ui_out *uiout)
-{
-  /* For CLI-like interpreters, print nothing.  */
-
-  if (uiout->is_mi_like_p ())
-    {
-      uiout->field_string ("reason",
-			   async_reason_lookup (EXEC_ASYNC_END_STEPPING_RANGE));
-    }
-}
-
-void
 print_signal_exited_reason (struct ui_out *uiout, enum gdb_signal siggnal)
 {
   annotate_signalled ();
diff --git a/gdb/infrun.h b/gdb/infrun.h
index 9b3c896..9513bc5 100644
--- a/gdb/infrun.h
+++ b/gdb/infrun.h
@@ -217,10 +217,6 @@ extern void set_step_info (thread_info *tp,
 extern void print_signal_received_reason (struct ui_out *uiout,
 					  enum gdb_signal siggnal);
 
-/* Print why the inferior has stopped.  We are done with a
-   step/next/si/ni command, print why the inferior has stopped.  */
-extern void print_end_stepping_range_reason (struct ui_out *uiout);
-
 /* The inferior was terminated by a signal, print why it stopped.  */
 extern void print_signal_exited_reason (struct ui_out *uiout,
 					enum gdb_signal siggnal);
diff --git a/gdb/mi/mi-interp.c b/gdb/mi/mi-interp.c
index 4f0bbd4..ce78b0c 100644
--- a/gdb/mi/mi-interp.c
+++ b/gdb/mi/mi-interp.c
@@ -61,7 +61,6 @@ static void mi_insert_notify_hooks (void);
 static void mi_remove_notify_hooks (void);
 
 static void mi_on_signal_received (enum gdb_signal siggnal);
-static void mi_on_end_stepping_range (void);
 static void mi_on_signal_exited (enum gdb_signal siggnal);
 static void mi_on_exited (int exitstatus);
 static void mi_on_normal_stop (struct bpstat *bs, int print_frame);
@@ -542,23 +541,6 @@ mi_on_signal_received (enum gdb_signal siggnal)
     }
 }
 
-/* Observer for the end_stepping_range notification.  */
-
-static void
-mi_on_end_stepping_range (void)
-{
-  SWITCH_THRU_ALL_UIS ()
-    {
-      struct mi_interp *mi = find_mi_interp ();
-
-      if (mi == NULL)
-	continue;
-
-      print_end_stepping_range_reason (mi->mi_uiout);
-      print_end_stepping_range_reason (mi->cli_uiout);
-    }
-}
-
 /* Observer for the signal_exited notification.  */
 
 static void
@@ -1317,8 +1299,6 @@ _initialize_mi_interp ()
   interp_factory_register (INTERP_MI, mi_interp_factory);
 
   gdb::observers::signal_received.attach (mi_on_signal_received, "mi-interp");
-  gdb::observers::end_stepping_range.attach (mi_on_end_stepping_range,
-					     "mi-interp");
   gdb::observers::signal_exited.attach (mi_on_signal_exited, "mi-interp");
   gdb::observers::exited.attach (mi_on_exited, "mi-interp");
   gdb::observers::no_history.attach (mi_on_no_history, "mi-interp");
diff --git a/gdb/observable.c b/gdb/observable.c
index 49de89c..82563e3 100644
--- a/gdb/observable.c
+++ b/gdb/observable.c
@@ -34,7 +34,6 @@ bool observer_debug = false;
 
 DEFINE_OBSERVABLE (normal_stop);
 DEFINE_OBSERVABLE (signal_received);
-DEFINE_OBSERVABLE (end_stepping_range);
 DEFINE_OBSERVABLE (signal_exited);
 DEFINE_OBSERVABLE (exited);
 DEFINE_OBSERVABLE (no_history);
diff --git a/gdb/observable.h b/gdb/observable.h
index 3066cf6..e4e6f02 100644
--- a/gdb/observable.h
+++ b/gdb/observable.h
@@ -57,9 +57,6 @@ extern observable<struct bpstat */* bs */, int /* print_frame */> normal_stop;
 /* The inferior was stopped by a signal.  */
 extern observable<enum gdb_signal /* siggnal */> signal_received;
 
-/* We are done with a step/next/si/ni command.  */
-extern observable<> end_stepping_range;
-
 /* The inferior was terminated by a signal.  */
 extern observable<enum gdb_signal /* siggnal */> signal_exited;