Removed dangling reference to element() in the image() section.

--HG--
extra : rebase_source : 6e93166abbb0b586c413cbf83983545a32f60966

Author: tabatkins

css3-images/Overview.html

@@ -491,7 +491,7 @@ <h3 id=image-notation><span class=secno>3.2. </span> Image Fallbacks and
   <pre class=prod><dfn
    id=image-list-type>&lt;image-list></dfn> = image( [ &lt;image-decl> , ]* [ &lt;image-decl> | &lt;color> ] )
 <dfn
-   id=image-decl-type>&lt;image-decl></dfn> = [ &lt;url> | &lt;string> | &lt;element-reference> ]</pre>
+   id=image-decl-type>&lt;image-decl></dfn> = [ &lt;url> | &lt;string> ]</pre>
 
   <p>Each &lsquo;<code class=css>&lt;string></code>&rsquo; or &lsquo;<code
    class=css>&lt;url></code>&rsquo; inside &lsquo;<code

css3-images/Overview.src.html

@@ -203,7 +203,7 @@ <h3 id="image-notation">
 	<p>The ''image()'' notation is defined as:
 
 	<pre class='prod'><dfn id='image-list-type'>&lt;image-list></dfn> = image( [ &lt;image-decl> , ]* [ &lt;image-decl> | &lt;color> ] )
-<dfn id='image-decl-type'>&lt;image-decl></dfn> = [ &lt;url> | &lt;string> | &lt;element-reference> ]</pre>
+<dfn id='image-decl-type'>&lt;image-decl></dfn> = [ &lt;url> | &lt;string> ]</pre>
 
 	<p>Each ''&lt;string>'' or ''&lt;url>'' inside ''image()'' represents an image, just as if the <a href="#url-notation">''url()'' notation</a> had been used.  As usual for URLs in CSS, relative URLs are resolved to an absolute URL (as described in Values &amp; Units [[!CSS3VAL]]) when a specified ''image()'' value is computed.</p>