Remove docs plugin

This is already included in the preset

Author: ohsayan

package.json

@@ -13,7 +13,6 @@
   },
   "dependencies": {
     "@docusaurus/core": "^2.0.0-beta.0",
-    "@docusaurus/plugin-content-docs": "*",
     "@docusaurus/preset-classic": "^2.0.0-beta.0",
     "@mdx-js/react": "^1.6.21",
     "clsx": "^1.1.1",