Fix type error

lib/events.ts

@@ -23,15 +23,14 @@ interface Metadata {
 }
 
 export interface Event {
-  content: string | MDXRemoteSerializeResult<Record<string, unknown>>;
+  content: MDXRemoteSerializeResult<Record<string, unknown>>;
   metadata: Metadata;
 }
 
 export async function getEventBySlug(
   year: string,
   term: string,
-  slug: string,
-  convert = true
+  slug: string
 ): Promise<Event> {
   const raw = await fs.readFile(
     path.join(EVENTS_PATH, year, term, `${slug}.event.md`),
@@ -40,7 +39,7 @@ export async function getEventBySlug(
   const { content, data: metadata } = matter(raw);
 
   return {
-    content: convert ? await serialize(content) : content,
+    content: await serialize(content),
     metadata: metadata as Metadata,
   };
 }