test(mobile): use shared inbox helpers

Generated-By: PostHog Code
Task-Id: c1bbe3cf-742b-4b24-bf96-d11a18b4cf22

Author: richardsolomou

apps/mobile/src/features/inbox/utils.test.ts

@@ -15,11 +15,7 @@ import type {
   SignalReportStatus,
 } from "@posthog/shared/domain-types";
 import { describe, expect, it } from "vitest";
-import {
-  buildInboxViewedProperties,
-  isRestorableReport,
-  sourceLine,
-} from "./utils";
+import { sourceLine } from "./utils";
 
 function signal(source_product: string, source_type: string): Signal {
   return {