[RFA] Remove exit_inferior_num_silent

[Tom Tromey <tom@tromey.com>]

The sole caller of exit_inferior_num_silent was getting the inferior's
number to then use the number to look up the inferior again.  I think
it's better to simply not have exit_inferior_num_silent; any potential
callers that only have the inferior's number should probably be
converted to pass the inferior itself around instead.

Tested by the buildbot.

gdb/ChangeLog
2018-07-03  Tom Tromey  <tom@tromey.com>

	* infrun.c (follow_exec): Use exit_inferior_silent.
	* inferior.c (exit_inferior_num_silent): Remove.
	* inferior.h (exit_inferior_num_silent): Don't declare.
---
 gdb/ChangeLog  | 6 ++++++
 gdb/inferior.c | 8 --------
 gdb/infrun.c   | 2 +-
 3 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 8ecf370e599..0841703435f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2018-07-03  Tom Tromey  <tom@tromey.com>
+
+	* infrun.c (follow_exec): Use exit_inferior_silent.
+	* inferior.c (exit_inferior_num_silent): Remove.
+	* inferior.h (exit_inferior_num_silent): Don't declare.
+
 2018-07-03  Tom Tromey  <tom@tromey.com>
 
 	PR cli/23340:
diff --git a/gdb/inferior.c b/gdb/inferior.c
index ab506f6aec5..22beea58a0c 100644
--- a/gdb/inferior.c
+++ b/gdb/inferior.c
@@ -250,14 +250,6 @@ exit_inferior_silent (inferior *inf)
   exit_inferior_1 (inf, 1);
 }
 
-void
-exit_inferior_num_silent (int num)
-{
-  struct inferior *inf = find_inferior_id (num);
-
-  exit_inferior_1 (inf, 1);
-}
-
 /* See inferior.h.  */
 
 void
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 28a4391c358..2eb25c03cda 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -1190,7 +1190,7 @@ follow_exec (ptid_t ptid, char *exec_file_target)
       /* Do exit processing for the original inferior before adding
 	 the new inferior so we don't have two active inferiors with
 	 the same ptid, which can confuse find_inferior_ptid.  */
-      exit_inferior_num_silent (current_inferior ()->num);
+      exit_inferior_silent (current_inferior ());
 
       inf = add_inferior_with_spaces ();
       inf->pid = pid;
-- 
2.17.1