refactor: remove dead code

frontend/src/lib/components/form/checkbox-with-label.svelte

@@ -1,35 +0,0 @@
-<script lang="ts">
-	import { Checkbox } from '$lib/components/ui/checkbox';
-	import * as Field from '$lib/components/ui/field';
-
-	let {
-		id,
-		checked = $bindable(),
-		label,
-		description,
-		disabled = false,
-		onCheckedChange
-	}: {
-		id: string;
-		checked: boolean;
-		label: string;
-		description?: string;
-		disabled?: boolean;
-		onCheckedChange?: (checked: boolean) => void;
-	} = $props();
-</script>
-
-<div class="items-top flex space-x-2">
-	<Checkbox
-		{id}
-		{disabled}
-		onCheckedChange={(v) => onCheckedChange && onCheckedChange(v == true)}
-		bind:checked
-	/>
-	<Field.Field class="gap-0">
-		<Field.Label for={id}>{label}</Field.Label>
-		{#if description}
-			<Field.Description>{description}</Field.Description>
-		{/if}
-	</Field.Field>
-</div>

frontend/src/lib/components/web-authn-unsupported.svelte

@@ -1,14 +0,0 @@
-<script>
-	import { m } from '$lib/paraglide/messages';
-	import Logo from './logo.svelte';
-</script>
-
-<div class="flex flex-col justify-center">
-	<div class="bg-muted mx-auto rounded-2xl p-3">
-		<Logo class="size-10" />
-	</div>
-	<p class="font-gloock mt-5 text-3xl font-bold sm:text-4xl">{m.browser_unsupported()}</p>
-	<p class="text-muted-foreground mt-3">
-		{m.this_browser_does_not_support_passkeys()}
-	</p>
-</div>