remove red outline on images in slide

customize.dist/main.css

@@ -1306,7 +1306,6 @@ html.cp,
   max-width: 90%;
   max-height: 90%;
   margin: auto;
-  border: 5px solid red;
 }
 .cp div.modal,
 .cp div#modal {

customize.dist/src/less/cryptpad.less

@@ -861,8 +861,6 @@ form.realtime, div.realtime {
             max-width: 90%;
             max-height: 90%;
             margin: auto;
-
-            border: 5px solid red;
         }
     }
 }