If you need to hide pages from search results, use the right tool for the job....

https://page-wiki.win/index.php/How_Do_I_Remove_a_Cached_Version_of_My_Page_from_Google%3F_A_Technical_SEO_Guide

If you need to hide pages from search results, use the right tool for the job. Add a noindex tag to the page header for a clean, permanent removal from Google’s index