fix : 테스트 수정 완료

Author: EpicFn

src/test/java/org/tuna/zoopzoop/backend/domain/dashboard/service/GraphServiceTest.java

@@ -60,10 +60,6 @@ void saveGraphWithNodesAndEdges() {
         edge.setEdgeKey("e1-2");
         edge.setSourceNodeKey("1");
         edge.setTargetNodeKey("2");
-        edge.setEdgeType(EdgeType.SMOOTHSTEP);
-        edge.setAnimated(true);
-        edge.setStroke("#999");
-        edge.setStrokeWidth(2.0);
         edge.setGraph(graph);
 
         // graph와 연결