[css-snappoints] Removing percentages from scroll-snap-area per recommendation from Elika

Author: ChumpChief

css-snappoints/Overview.bs

@@ -264,18 +264,18 @@ Ignored Terms: scroll-snap-positions-*, containing block chain
 
     <pre class="propdef">
     Name: scroll-snap-area
-    Value: [ <<length>> | <<percentage>> ]{1,4}
+    Value: <<length>>{1,4}
     Initial: 0
     Applies to: all elements
     Inherited: no
-    Percentages: relative to the border box
+    Percentages: n/a
     Media: interactive
     Computed value: as specified, with lengths made absolute
     Animatable: yes
     </pre>
 
     <dl dfn-type=value dfn-for="scroll-snap-area">
-        <dt><dfn>[ <<length>> | <<percentage>> ]{1,4}</dfn>
+        <dt><dfn><<length>>{1,4}</dfn>
         <dd>
             Specifies the outset of the element's snap area from the axis-aligned bounding box of the transformed border box, in the <a>scroll container's</a> coordinate space.  Outsets are applied to this bounding box, not the border box.