Set Up HRMS > Common Definitions > Folder Tabs > Configure Folder Tabs
Or use
Main Menu>>Enterprise Components>>Find Object Navigation and search for Component Name HCSC_TAB_DEFN
When I deleted the Tabs the component stopped loading and gave me hard peoplecode errors, because the component has hard coded values for the number of tabs it is expecting. So to make this happen I configured all the tabs that I wanted to delete and moved them to the end of the Tabset and used JavaScript to hide them in the component. I also renamed the Tab Set Id from Tab## to ZZHIDE for the tabs that I wanted to hide.
This simplified my JavaScript to one line.
<script language="JavaScript"> $(document).ready(function(){ $( "a[name$='ZZHIDE']" ).css( "visibility", "hidden" ); }) </script>