exit: fix misleading comment in forget_original_parent()

The commit 482a376 ("exit: reparent: call forget_original_parent()
under tasklist_lock") moved the comment from exit_notify() to
forget_original_parent().  However, the forget_original_parent() only
handles (A), while (B) is handled in kill_orphaned_pgrp().  So remove the
unrelated part.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Fushuai Wang <[email protected]>
Acked-by: Oleg Nesterov <[email protected]>
Cc: Andrii Nakryiko <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Mateusz Guzik <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: wangfushuai <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Fushuai Wang

kernel/exit.c

@@ -692,12 +692,7 @@ static void reparent_leader(struct task_struct *father, struct task_struct *p,
 }
 
 /*
- * This does two things:
- *
- * A.  Make init inherit all the child processes
- * B.  Check to see if any process groups have become orphaned
- *	as a result of our exiting, and if they have any stopped
- *	jobs, send them a SIGHUP and then a SIGCONT.  (POSIX 3.2.2.2)
+ * Make init inherit all the child processes
  */
 static void forget_original_parent(struct task_struct *father,
 					struct list_head *dead)