[pushed] gdb: fix some inferior_created observer signatures

[Simon Marchi <simon.marchi@efficios.com>]

I just noticed that in a7aba2668a7b ("gdb: remove arguments from
inferior_created observable"), I forgot to update
aix_thread_inferior_created and procfs_inferior_created, which are in
files I can't compile.

Remove the parameters from aix_thread_inferior_created.  And simply
remove procfs_inferior_created, since it's empty anyway.

gdb/ChangeLog:

	* aix-thread.c (aix_thread_inferior_created): Remove parameters.
	* procfs.c (procfs_inferior_created): Remove.
	(_initialize_procfs): Don't register procfs_inferior_created.

Change-Id: Ifc7def7c096332033b5d466d32cb873d1df18c2c
---
 gdb/ChangeLog    | 6 ++++++
 gdb/aix-thread.c | 2 +-
 gdb/procfs.c     | 9 ---------
 3 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 737091e390b9..ca7a0caae5c9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-10-02  Simon Marchi  <simon.marchi@efficios.com>
+
+	* aix-thread.c (aix_thread_inferior_created): Remove parameters.
+	* procfs.c (procfs_inferior_created): Remove.
+	(_initialize_procfs): Don't register procfs_inferior_created.
+
 2020-10-02  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* async-event.c (invoke_async_signal_handlers): Add debug
diff --git a/gdb/aix-thread.c b/gdb/aix-thread.c
index ed30df5f3f62..b4100a55ae95 100644
--- a/gdb/aix-thread.c
+++ b/gdb/aix-thread.c
@@ -1015,7 +1015,7 @@ new_objfile (struct objfile *objfile)
 /* Attach to process specified by ARGS.  */
 
 static void
-aix_thread_inferior_created (struct target_ops *ops, int from_tty)
+aix_thread_inferior_created ()
 {
   pd_enable ();
 }
diff --git a/gdb/procfs.c b/gdb/procfs.c
index c017f4a15517..31f33fe9a2b4 100644
--- a/gdb/procfs.c
+++ b/gdb/procfs.c
@@ -2867,13 +2867,6 @@ procfs_target::create_inferior (const char *exec_file,
   procfs_init_inferior (pid);
 }
 
-/* An observer for the "inferior_created" event.  */
-
-static void
-procfs_inferior_created (struct target_ops *ops, int from_tty)
-{
-}
-
 /* Callback for update_thread_list.  Calls "add_thread".  */
 
 static int
@@ -3470,8 +3463,6 @@ void _initialize_procfs ();
 void
 _initialize_procfs ()
 {
-  gdb::observers::inferior_created.attach (procfs_inferior_created);
-
   add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd,
 	   _("Give a trace of entries into the syscall."));
   add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd,
-- 
2.26.2