graphdb: pass context to DisconnectBlockAtHeight

graph/db/kv_store.go

@@ -1760,8 +1760,8 @@ func (c *KVStore) pruneGraphNodes(nodes kvdb.RwBucket,
 // set to the last prune height valid for the remaining chain.
 // Channels that were removed from the graph resulting from the
 // disconnected block are returned.
-func (c *KVStore) DisconnectBlockAtHeight(height uint32) (
-	[]*models.ChannelEdgeInfo, error) {
+func (c *KVStore) DisconnectBlockAtHeight(_ context.Context,
+	height uint32) ([]*models.ChannelEdgeInfo, error) {
 
 	// Every channel having a ShortChannelID starting at 'height'
 	// will no longer be confirmed.