diff --git a/src/main/java/GraphModificationFunctions.java b/src/main/java/GraphModificationFunctions.java
index a80e9e3..a4ab1a0 100644
--- a/src/main/java/GraphModificationFunctions.java
+++ b/src/main/java/GraphModificationFunctions.java
@@ -4,7 +4,6 @@ import org.jgrapht.graph.SimpleWeightedGraph;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 
 public interface GraphModificationFunctions {