@jerad 
To redirect a subdomain from HTTPS to HTTP, you can follow these steps:
1 2 3 4  | 
<VirtualHost *:443>
    ServerName subdomain.example.com
    Redirect permanent / http://subdomain.example.com
</VirtualHost>
 | 
Replace 'subdomain.example.com' with your actual subdomain.
After completing these steps, visitors trying to access the HTTPS version of the subdomain will be automatically redirected to the HTTP version.