Clean up CSS by removing duplicate styles (#1102)

Removed duplicate height, margin, and padding styles from html and body.

Author: willum070

samples/advanced-markers-animation/style.css

@@ -35,13 +35,6 @@ body {
     height: 100%;
 }
 
-html,
-body {
-    height: 100%;
-    margin: 0;
-    padding: 0;
-}
-
 @keyframes drop {
     0% {
         transform: translateY(-200px) scaleY(0.9);