fix(icon): Remove fixed left-to-right direction to fix RTL styling

PiperOrigin-RevId: 500760821

Author: dfreedm

icon/lib/_icon.scss

@@ -36,7 +36,6 @@ $_custom-property-prefix: 'icon';
     text-transform: none;
     white-space: nowrap;
     word-wrap: normal;
-    direction: ltr;
 
     /* Support for all WebKit browsers. */
     -webkit-font-smoothing: antialiased;