diff --git a/test/preflow_graph.lgf b/test/preflow_graph.lgf
deleted file mode 100644
--- a/test/preflow_graph.lgf
+++ /dev/null
@@ -1,34 +0,0 @@
-@nodes
-label
-0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-@arcs
-		label	capacity
-0	1	0	20
-0	2	1	0
-1	1	2	3
-1	2	3	8
-1	3	4	8
-2	5	5	5
-3	2	6	5
-3	5	7	5
-3	6	8	5
-4	3	9	3
-5	7	10	3
-5	6	11	10
-5	8	12	10
-6	8	13	8
-8	9	14	20
-8	1	15	5
-9	5	16	5
-@attributes
-source 1
-target 8