docs(ui): drop the outline chip comments

The token names carry the layering (inset under overlay) and the
outer box-shadow ring is a standard idiom.

Author: librowski

packages/ui/src/components/chips/chips.module.css

@@ -13,13 +13,11 @@
   }
 
   .outline {
-    /* Two stacked fills: the brand surface under the theme overlay. */
     background-color: var(--wb-components-chips-inset-outline);
     background-image: linear-gradient(
       var(--wb-components-chips-overlay-outline),
       var(--wb-components-chips-overlay-outline)
     );
-    /* The stroke sits outside the box; a border would consume the padding. */
     box-shadow: 0 0 0 var(--wb-size-12) var(--wb-components-chips-inset-outline);
     color: var(--wb-components-chips-inset-outline);
   }