examples/pcscf: Remove unused param "lookup_check_received"

examples/pcscf/kamailio.cfg

@@ -351,7 +351,6 @@ modparam("ims_usrloc_pcscf", "db_url", DB_URL)
 modparam("ims_usrloc_pcscf", "db_mode", 1)
 #!endif
 modparam("ims_usrloc_pcscf", "hashing_type", 2)
-modparam("ims_usrloc_pcscf", "lookup_check_received", 0)
 modparam("ims_usrloc_pcscf", "enable_debug_file", 0)
 modparam("ims_usrloc_pcscf", "match_contact_host_port", 1)
 modparam("ims_registrar_pcscf", "is_registered_fallback2ip", 1)