remove ref to prevent_sidebar_scroll and unused vars

site/src/routes/examples/_TableOfContents.svelte

@@ -33,12 +33,7 @@
 	});
 </script>
 
-<ul
+<ul bind:this={ul} class="examples-toc">
-	bind:this={ul}
-	class="examples-toc"
-	on:mouseenter="{() => prevent_sidebar_scroll = true}"
-	on:mouseleave="{() => prevent_sidebar_scroll = false}"
->
 	{#each sections as section}
 		<li>
 			<span class="section-title">

site/src/routes/examples/index.svelte

@@ -1,6 +1,6 @@
 <!-- FIXME sometimes it adds a trailing slash when landing -->
 <script context="module">
-	export async function preload({params, query}) {
+	export async function preload() {
 		const sections = await this.fetch(`examples.json`).then(r => r.json());
 		const title_by_slug = sections.reduce((acc, {examples}) => {
 			examples.forEach(({slug, title}) => {