refactor: remove dead code

frontend/src/routes/settings/admin/oidc-clients/client-secret.svelte

@@ -1,29 +0,0 @@
-<script lang="ts">
-	import * as Dialog from '$lib/components/ui/dialog';
-	import * as Field from '$lib/components/ui/field';
-	import Input from '$lib/components/ui/input/input.svelte';
-	import { m } from '$lib/paraglide/messages';
-
-	let {
-		oneTimeLink = $bindable()
-	}: {
-		oneTimeLink: string | null;
-	} = $props();
-
-	function onOpenChange(open: boolean) {
-		if (!open) {
-			oneTimeLink = null;
-		}
-	}
-</script>
-
-<Dialog.Root open={!!oneTimeLink} {onOpenChange}>
-	<Dialog.Content class="max-w-md">
-		<Dialog.Header>
-			<Dialog.Title>{m.one_time_link()}</Dialog.Title>
-			<Dialog.Description>{m.use_this_link_to_sign_in_once()}</Dialog.Description>
-		</Dialog.Header>
-		<Field.Label for="one-time-link">{m.one_time_link()}</Field.Label>
-		<Input id="one-time-link" value={oneTimeLink} readonly />
-	</Dialog.Content>
-</Dialog.Root>