"ShowHeader Deprecated Function"

I am updating a site from CMSB 2.5 to CMSB 3.5 and moving from MySQL 5 to 7.

I have made the suggested changes to reportBuilder.php code to update its functions, but when running reports get an alert at the page top saying:

"This plugin is using a deprecated function (showHeader) and may not display or work correctly"

I see that there is a call to the showheader() function in the reportbuilder code, and that this references old_alias_functions.php

I don't see any new, updated reportBuilder plugin in the plugin area. Can you point me in the right direction?

Thanks