fix: lint error

Author: PerfectPan

src/components/mdx-runtime/link.tsx

@@ -2,7 +2,7 @@ import type { ReactNode } from 'react';
 
 interface LinkProps {
   children?: ReactNode;
-  href: string;
+  href?: string | undefined;
 }
 
 export const Link = (props: LinkProps) => {

src/pages/blog/[slug].tsx

@@ -1,7 +1,6 @@
 import { readFileSync, readdirSync } from 'node:fs';
 import path from 'node:path';
 import rehypeShikiFromHighlighter from '@shikijs/rehype/core';
-// @ts-expect-error no exported member
 import { compileMDX } from 'next-mdx-remote/rsc';
 import rehypeKatex from 'rehype-katex';
 import remarkMath from 'remark-math';