chore: 불필요한 style 로드 삭제

Author: MU-Software

apps/pyconkr/index.html

@@ -39,7 +39,6 @@
     <meta name="robots" content="index, follow" />
 
     <script src="https://cdn.iamport.kr/v1/iamport.js"></script>
-    <link rel="stylesheet" href="github-markdown.css">
 
     <title>PyCon Korea 2025</title>
   </head>

package.json

@@ -31,7 +31,6 @@
     "@tanstack/react-query": "^5.76.1",
     "astring": "^1.9.0",
     "axios": "^1.9.0",
-    "github-markdown-css": "^5.8.1",
     "globals": "^15.15.0",
     "mui-mdx-components": "^0.5.0",
     "notistack": "^3.0.2",