graph/db: thread context through IsZombieEdge

graph/db/kv_store.go

@@ -4344,7 +4344,7 @@ func (c *KVStore) markEdgeLiveUnsafe(tx kvdb.RwTx, chanID uint64) error {
 // IsZombieEdge returns whether the edge is considered zombie. If it is a
 // zombie, then the two node public keys corresponding to this edge are also
 // returned.
-func (c *KVStore) IsZombieEdge(v lnwire.GossipVersion,
+func (c *KVStore) IsZombieEdge(_ context.Context, v lnwire.GossipVersion,
 	chanID uint64) (bool, [33]byte, [33]byte, error) {
 
 	var (