Simplified js expression in templates

REMARK_URL is required and window.location.origin is not needed.

https://github.com/umputun/remark42/pull/806#discussion_r519458452

frontend/comments.ejs

@@ -68,7 +68,7 @@
 
         var remark_config = {
           site_id: query.site_id,
-          host: '<%= REMARK_URL %>' || window.location.origin,
+          host: '<%= REMARK_URL %>' ,
           url: query.url
         };
 

frontend/counter.ejs

@@ -39,7 +39,7 @@
   <script>
     var remark_config = {
       site_id: 'remark',
-      host: '<%= REMARK_URL %>' || window.location.origin,
+      host: '<%= REMARK_URL %>',
       url: 'https://remark42.com/demo/',
       components: ['counter']
     };

frontend/index.ejs

@@ -123,7 +123,7 @@
 
       var remark_config = {
         site_id: 'remark',
-        host: '<%= REMARK_URL %>' || window.location.origin,
+        host: '<%= REMARK_URL %>',
         url: 'https://remark42.com/demo/',
         components: ['embed', 'counter'],
         // __colors__: {

frontend/last-comments.ejs

@@ -25,7 +25,7 @@
     <script>
       var remark_config = {
         site_id: 'remark',
-        host: '<%= REMARK_URL %>' || window.location.origin,
+        host: '<%= REMARK_URL %>',
         components: ['last-comments']
       };