removed unused import that breaks unit tests

packages/medusa/src/api/routes/store/variants/__tests__/get-variant.js

@@ -1,4 +1,3 @@
-import { IdMap } from "../../../../../../../medusa-test-utils/dist"
 import { request } from "../../../../../helpers/test-request"
 import { ProductVariantServiceMock } from "../../../../../services/__mocks__/product-variant"