[css-display] Remove statement about blockification turning flow into flow-root as this is inconsistent with CSS2.1§9.7 https://www.w3.org/TR/CSS2/visuren.html#dis-pos-flo and also unnecessary. w3c#1212

Author: fantasai

css-display/Overview.bs

@@ -573,8 +573,6 @@ Automatic Box Type Transformations</h3>
 		</ul>
 	</div>
 
-	If a box with a ''flow'' <a>inner display type</a> is <a>blockified</a>,
-	its <a>inner display type</a> becomes ''flow-root''.
 	If a box with a ''flow'' <a>inner display type</a> is <a>inlinified</a>,
 	it recursively <a>inlinifies</a> all of its in-flow children,
 	so that no block-level descendants