diff --git a/src/repositories/UnoptimizedInMemoryRepository.ts b/src/repositories/UnoptimizedInMemoryRepository.ts
index 273aab6..e347803 100644
--- a/src/repositories/UnoptimizedInMemoryRepository.ts
+++ b/src/repositories/UnoptimizedInMemoryRepository.ts
@@ -1,6 +1,5 @@
 import { GetterSetterRepository } from "./GetterSetterRepository";
 import { IEntityWithId, IEta, IOrderedStop, IRoute, IShuttle, IStop, ISystem } from "../entities/entities";
-import { TupleKey } from "../types/TupleKey";
 
 /**
  * An unoptimized in memory repository.