system_keyring.c doesn't need to #include module-internal.h

system_keyring.c doesn't need to #include module-internal.h as it doesn't use
the one thing that exports.  Remove the inclusion.
Signed-off-by: David Howells <dhowells@redhat.com>

kernel/system_keyring.c

@@ -16,7 +16,6 @@
 #include <linux/err.h>
 #include <keys/asymmetric-type.h>
 #include <keys/system_keyring.h>
-#include "module-internal.h"
 
 struct key *system_trusted_keyring;
 EXPORT_SYMBOL_GPL(system_trusted_keyring);