Removed old text about resolving flex() on margins/paddings

Author: tabatkins

css3-flexbox/Overview.src.html

@@ -709,10 +709,6 @@ <h3 id='initial-computation'>
 					<p>If the length is inflexible, set the preferred size to the
 					length itself and both positive and negative flexibility to 0.</p>
 
-					<p>Otherwise, if the length was specified with the ''flex()'' function,
-					set the positive flexibility, negative flexibility,
-					and preferred size to the values specified in the function.</p>
-
 					<p>If the length is a margin with the value ''auto'', set the 
 					preferred size to 0, the positive flexibility to 1, and the negative
 					flexibility to 0.</p>