fix astro build

apps/www/src/components/BlogHeader.astro

@@ -1,8 +1,4 @@
 ---
-import { getCategories } from "@/lib/fetchers";
-
-const categories = await getCategories();
-
 type Props = {
   title: string;
 };

apps/www/src/lib/fetchers.ts

@@ -1,34 +1,15 @@
 import { getCollection } from "astro:content";
 
-export const getCategories = async () => {
-  const posts = await getCollection("blog");
-  const categories = [
-    ...new Set(posts.map((post) => post.data.category).flat()),
-  ];
-
-  return categories;
-};
-
 export const getPosts = async () => {
   const posts = (await getCollection("blog")).sort(
     (a, b) => b.data.pubDate.valueOf() - a.data.pubDate.valueOf(),
   );
-
-  return posts;
-};
-
-export const getPostsByCategory = async (category: string) => {
-  const posts = (await getCollection("blog"))
-    .filter((post) => post.data.category.includes(category))
-    .sort((a, b) => b.data.pubDate.valueOf() - a.data.pubDate.valueOf());
-
   return posts;
 };
 
 export const getGuides = async () => {
   const guides = (await getCollection("guides"))
     .filter((guide) => guide.data.published)
     .sort((a, b) => b.data.pubDate.valueOf() - a.data.pubDate.valueOf());
-
   return guides;
 };