How can I set OWA to use Public by default and hide that section from OWA?

I have an Exchange 2013 deployment that needs a customized OWA page.  I've already run Set-OwaVirtualDirectory "ex1\owa*" -LogonPagePublicPrivateSelectionEnabled $True to show the Public option.  I've also edited the logon.aspx file to set the checkbox to be unchecked by default.  My problem is I need to hide that entire line, I don't want users to see that section at all as if I never ran the above command.  When I was testing hiding it with <!-- --> it hid it but caused that piece to stop working as it went back to private.  Has anyone been able to accomplish this or can clue me in on how to do this?  Thank you in advance.