[css2-testing] Removed an SGML comment that is no longer needed.

Author: bert-github

css2-testing/colors.src

@@ -81,9 +81,6 @@ anchored at the same point as they would be if they were painted only
 for the root element.
 </p>
 
-<!-- ToDo: ask the WG to validate the following text for erratum
-http://www.w3.org/Style/css2-updates/REC-CSS2-20110607-errata.html#s.14.2 -->
-
 <p>However, if no boxes are generated for the element whose background
 would be used for the background of the canvas, then the canvas
 background is transparent. (in CSS&nbsp;2.1, that is the case when the
@@ -93,8 +90,6 @@ element or an ancestor has 'display: none'.)
 'display: none', boxes <em>are</em> generated for it and its
 background <em>is</em> used for the canvas.
 
-<!-- end of erratum -->
-
 <div class="html example"><p>
 According to these rules, the canvas underlying the following 
 HTML document will have a "marble" background: