[css-multicol] removing example text fixes w3c#4291

Author: rachelandrew

css-multicol-1/Overview.bs

@@ -100,8 +100,6 @@ Introduction</h2>
 		body { columns: 2 12em }
 		</pre>
 
-		However, as described below, setting both the width and number of
-		columns rarely makes sense.
 	</div>
 
 	Another group of properties introduced in this module describe
@@ -1524,6 +1522,8 @@ This appendix is <em>informative</em>.
 
 <h3 id="changes-from-20180528">Changes from the <a href="https://www.w3.org/TR/2018/WD-css-multicol-1-20180528/">Working Draft (WD) of 28 May 2018</a></h3>
 <ul>
+	<li>Removed the non-normative text 
+	"However, as described below, setting both the width and number of columns rarely makes sense." Editorial 16 Sep 2019, <a href="https://github.com/w3c/csswg-drafts/issues/4291">issue 4291</a>.</li>
 	<li>Added the paragraph, "Spanners are block-level boxes 
 	therefore the margins of two adjacent spanners will collapse with each other.
 	As column boxes establish a new [=block formatting context=],