Update SPORE protocols to use new ticket mechanism:

- Use builtin Ticket type instead of user type
- Remove remark that -m2 matching is required as it no longer is

spdl/SPORE/denning-sacco-lowe.spdl

@@ -5,14 +5,13 @@
 #
 # Note:
 # This protocol uses a ticket so scyther will only be able to verify
-# the protocol using the ARACHNE engine (-a) and type 2 matching (-m2)
+# the protocol using the ARACHNE engine (-a)
 #
 # Note:
 # According to SPORE there are no attacks on this protocol, scyther
 # finds one however. This has to be investigated further.
 
 usertype Key;
-usertype Ticket;
 usertype SessionKey;
 usertype TimeStamp;
 secret k: Function;