To hide the login signup link (for example if you have signup during checkout in an ecommerce store), you can add this snippet to your functions.php file or in a custom plugin to disable registration links on the login screen etc
function disable_tml_registration( $action ) {
if ( 'register' == $action ) {
tml_unregister_action( $action );
}
}
add_action( 'tml_registered_action', 'disable_tml_registration' );