diff --git a/lib/src/Simulation.dart b/lib/src/Simulation.dart
index 07cd115..79cc019 100644
--- a/lib/src/Simulation.dart
+++ b/lib/src/Simulation.dart
@@ -6,8 +6,6 @@ import 'package:rules_of_living/src/Grid.dart';
 import 'package:rules_of_living/src/rules/GameOfLife.dart';
 import 'package:rules_of_living/src/rules/RuleSet.dart';
 
-enum CellPattern { SpaceShip, Blinker }
-
 class Simulation {
   Grid<bool> map;
   Grid<bool> _snapshot;