Remove noindex meta tag from alias.html

Remove noindex meta tag from alias.html

Google does not behave as expected when an alias is used. It does not index the client-side alias page, but on top of that it also does not index the original page.

Google does not require noindex to be present and since alias pages do not have any content, it makes little sense to provide it. Therefore, this patch removes the line completely.

https://developers.google.com/search/docs/crawling-indexing/301-redirects