chore: remove unused packages (#3)

Author: maxcell

package.json

@@ -9,19 +9,12 @@
   },
   "dependencies": {
     "@mapbox/rehype-prism": "^0.8.0",
-    "@octokit/auth-oauth-app": "^4.3.0",
-    "@octokit/auth-oauth-user": "^1.3.0",
-    "@octokit/auth-token": "^2.5.0",
-    "@octokit/core": "^3.5.1",
-    "@octokit/plugin-rest-endpoint-methods": "^5.13.0",
     "@tailwindcss/typography": "^0.5.0",
     "classnames": "^2.3.1",
-    "github-oauth-popup": "^1.2.0",
     "gray-matter": "^4.0.2",
     "next": "latest",
     "next-mdx-remote": "^3.0.1",
     "next-remote-watch": "1.0.0",
-    "octokit": "^1.7.1",
     "prismjs": "^1.25.0",
     "react": "^17.0.2",
     "react-dom": "^17.0.2"