Shopify Lockdown App: How to remove the "Continue as Guest" button from the login screen.

gistfile1.html

<!--In theme.liquid, change:-->

<meta content="0; url=/account/login?checkout_url={{ return_url }}" http-equiv="refresh" />

<!--to -->

<meta content="0; url=/account/login?return_url={{ return_url }}" http-equiv="refresh" />

<!-- In customers/login.liquid, give the submit button an ID of customerlogin, for example: -->

<input class="btn" type="submit" value="Sign In" id="customerlogin" />

<!-- Add this script to the bottom of customers/login.liquid:-->

<script type="text/javascript">
$('#customerlogin').click( function(e){
  e.preventDefault();
 
    var getUrlVars = function()
     {
       var vars = [], hash;
       var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');

         for(var i = 0; i < hashes.length; i++)
         {
             hash = hashes[i].split('=');
             vars.push(hash[0]);
             vars[hash[0]] = hash[1];
             if(hash[0] == "return_url") {
	
  			var randnum = Math.floor(Math.random()*1001);
             $.ajax({
      		type: "POST",
      		url: "/account/login",
      		cache: false,
      		data: $('#customer_login').serialize() + "&random=" + randnum,
      		success: function(html){                 
					window.location.href = vars[hash[0]];           		
      		}
             });
             } else {
               $('#customer_login').submit(); 
             }
         }
      
     
       return vars;
     }
 getUrlVars()
});
</script>