docs(all): do not generate main version anymore (#406)

Author: ijemmy

Diff for: .github/workflows/on-release-prod.yml

@@ -70,10 +70,6 @@ jobs:
         echo "Publishing doc for version: $VERSION"
         mkdocs build
         mike deploy --push --update-aliases --no-redirect "$VERSION" "$ALIAS"
-        # Once we have agreed on release process, we will also use "main" 
-        # to track the development version (on main branch). 
-        # For now, we make it the same as the latest version.
-        mike deploy --push --update-aliases --no-redirect "main" "$ALIAS"
         # Set latest version as a default
         mike set-default --push latest
     - name: Build API docs