refactor: Remove app store index (#23449)

* Remove app store index

* Remove reliance on app-store mock

* Remove app store mock

tests/libs/__mocks__/app-store.ts

@@ -1,19 +0,0 @@
-import { beforeEach, vi } from "vitest";
-import { mockReset, mockDeep } from "vitest-mock-extended";
-
-import type * as appStore from "@calcom/app-store";
-
-vi.mock("@calcom/app-store", () => appStoreMock);
-
-beforeEach(() => {
-  mockReset(appStoreMock);
-});
-
-const appStoreMock = mockDeep<typeof appStore>({
-  fallbackMockImplementation: () => {
-    throw new Error(
-      "Unimplemented appStoreMock. You seem to have not mocked the app that you are trying to use"
-    );
-  },
-});
-export default appStoreMock;