Hey, @NAga_VaMshi bro.
To disable Author page from indexing, you can disable this option. Go to Yoast SEO > Titles & Metas > Archives > Author Archives.
You don't need to delete the URL from search engines bro, if you 'noindex' them, they'll vanish in a while.
Go to Google Search Console > Google Index > Remove URLs. You can do the needful here bro.
If you have any more queries, do kindly let us know mate.