common: remove unused type field.

We always use modern TLV style: in fact, this field was never set!

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell

common/onion_encode.h

@@ -7,13 +7,7 @@
 struct route_step;
 struct tlv_encrypted_data_tlv_payment_relay;
 
-enum onion_payload_type {
-	ONION_V0_PAYLOAD = 0,
-	ONION_TLV_PAYLOAD = 1,
-};
-
 struct onion_payload {
-	enum onion_payload_type type;
 	/* Is this the final hop? */
 	bool final;