Remove SP list columns from search results

Josh_Wickes, I did not want to impact search results for other sites I just wanted to make the changes for the site with the staff directory.  So, at this point I'm reluctant to make any changes at the tenant level.  I've removed the mappings for ows_Created_x0020_By and ows_Modified_x0020_By at the site level, but so far it hasn't made a difference.  All of the settings for the managed properties are grayed out so I'm unable to make any changes to the settings.  According to https://learn.microsoft.com/en-us/sharepoint/manage-search-schema#:~:text=For%20the%20built%2Din%20managed%20properties%2C%20you%20can%20change%20their%20mappings%20to%20crawled%20properties%2C%20but%20the%20only%20setting%20you%20can%20change%20is%20the%20alias. the only settings that you can change for built-in managed properties are their mappings to crawled properties and the alias.

I'm unsure of how long it takes for a site or list to be recrawled.  My understanding is that if you request that a site be reindexed that that just adds it to the que.  I'll take a look after the weekend and see if the search results have changed.