kmod: remove call_usermodehelper_fns()

This function suffers from not being able to determine if the cleanup is
called in case it returns -ENOMEM.  Nobody is using it anymore, so let's
remove it.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: James Morris <james.l.morris@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Tejun Heo <tj@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/kmod.h b/include/linux/kmod.h
index 7eebcf5..0555cc6 100644
--- a/include/linux/kmod.h
+++ b/include/linux/kmod.h
@@ -67,9 +67,7 @@
 };
 
 extern int
-call_usermodehelper_fns(char *path, char **argv, char **envp, int wait,
-			int (*init)(struct subprocess_info *info, struct cred *new),
-			void (*cleanup)(struct subprocess_info *), void *data);
+call_usermodehelper(char *path, char **argv, char **envp, int wait);
 
 extern struct subprocess_info *
 call_usermodehelper_setup(char *path, char **argv, char **envp, gfp_t gfp_mask,
@@ -79,13 +77,6 @@
 extern int
 call_usermodehelper_exec(struct subprocess_info *info, int wait);
 
-static inline int
-call_usermodehelper(char *path, char **argv, char **envp, int wait)
-{
-	return call_usermodehelper_fns(path, argv, envp, wait,
-				       NULL, NULL, NULL);
-}
-
 extern struct ctl_table usermodehelper_table[];
 
 enum umh_disable_depth {