simplifying ems rems example

Author: chrisdavidmills

learn/values-units/em-rem.html

@@ -11,16 +11,12 @@
     </style>
 
     <style class="editable">
-      html {
-        font-size: 0.8em;
-      }
-
       .ems li {
-        font-size: 1.5em;
+        font-size: 1.3em;
       }
 
       .rems li {
-        font-size: 1.5rem;
+        font-size: 1.3rem;
       }
     </style>
   </head>
@@ -63,16 +59,12 @@
     </section>
 
     <textarea class="playable playable-css" style="height: 280px;">
-html {
-  font-size: .8em;
-}
-
 .ems li {
-  font-size: 1.5em;
+  font-size: 1.3em;
 }
 
 .rems li {
-  font-size: 1.5rem;
+  font-size: 1.3rem;
 }
 
 
@@ -92,7 +84,7 @@
       </li>
     </ul>
   </li>
-</ul>  
+</ul>
 
 <ul class="rems">
   <li>One</li>