undefined check for link.link, remove heroImage

src/components/Sidebar.astro

@@ -1,12 +1,13 @@
 ---
-import get, {Link} from '@/content/sidebar';
+import get from '@/content/sidebar';
+import type { Link } from '@/content/sidebar';
 import clsx from 'clsx';
 const { currentPage } = Astro.props;
 const currentPageMatch = currentPage.slice(1);
 
 const getLinkClasses = (link: Link) => {
 	const baseClasses = "block py-2 px-6 my-1 transition-colors border-l hover:border-zinc-400 hover:text-slate-900"
-	const isCurrent = link.link !== null ? link.link.includes(currentPageMatch) : false;
+	const isCurrent = link.link !== undefined ? link.link.includes(currentPageMatch) : false;
 
 	return clsx(baseClasses, {
 		// Classes for when the link is not the current page

src/pages/handbook/index.astro

@@ -93,7 +93,6 @@ const posts = (await getCollection('handbook')).sort(
 						posts.map((post) => (
 							<li>
 								<a href={`/handbook/${post.slug}/`}>
-									<img width={720} height={360} src={post.data.heroImage} alt="" />
 									<h4 class="title">{post.data.title}</h4>
 									<p class="date">
 										<FormattedDate date={post.data.pubDate} />