chore: remove useless migration code

Author: WarningImHack3r

src/routes/+layout.svelte

@@ -7,7 +7,6 @@
 	import { ProgressBar } from "@prgm/sveltekit-progress-bar";
 	import { ModeWatcher, resetMode, setMode } from "mode-watcher";
 	import { MetaTags, deepMerge } from "svelte-meta-tags";
-	import { toast } from "svelte-sonner";
 	import { news } from "$lib/news/news.json";
 	import type { Entries } from "$lib/types";
 	import { cn } from "$lib/utils";
@@ -64,25 +63,6 @@
 				? localStorage["mode-watcher-mode"].replace(/"/g, "")
 				: "system";
 
-		// v2 migration
-		if ("token" in localStorage) {
-			toast.success("Welcome to svelte-changelog v2!", {
-				description: "Thanks for visiting this site since v1 :)",
-				duration: 7_500
-			});
-			localStorage.removeItem("token");
-		}
-		for (const key of [
-			"displaySvelteBetaReleases",
-			"displayKitBetaReleases",
-			"displayOtherBetaReleases",
-			"svelteMostRecentUpdate",
-			"kitMostRecentUpdate",
-			"othersMostRecentUpdate"
-		]) {
-			localStorage.removeItem(key);
-		}
-
 		// Legacy news key
 		const oldLsNewsKey = "closedNews";
 		const oldLsNewsValue = localStorage.getItem(oldLsNewsKey);