revert: "docs: add new architecture guide docs"

This reverts commit be16a66.

Author: khushal87

docusaurus/docs/reactnative/guides/new-architecture.mdx

@@ -156,7 +156,6 @@
     "Advanced Guides": [
       "guides/audio-messages-support",
       "guides/date-time-formatting",
-      "guides/new-architecture",
       "guides/native-image-picker",
       "customization/typescript",
       "basics/troubleshooting",