[css-align] Remove self-link. Fixes w3c#1404.

Author: tabatkins

css-align/Overview.bs

@@ -227,7 +227,7 @@ Alignment Terminology</h2>
 			or are limited in how much space they can consume;
 			for example, ''space-between'' can only operate when there is more than one <a>alignment subject</a>,
 			and baseline alignment, once fulfilled, might not be enough to absorb all the excess space.
-			In these cases a <a>fallback alignment</a> takes effect
+			In these cases a fallback alignment takes effect
 			(as defined below)
 			to fully consume the excess space.
 	</dl>