Change default-object-size issue to a note that future specs will need to define the DOS by themselves.

Author: tabatkins

css3-images/Overview.html

@@ -1485,10 +1485,9 @@ <h3 id=sizing-terms><span class=secno>6.1. </span> Object-Sizing
        rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>
      </dl>
 
-     <p class=issue>The only reason these are examples is because the proper
-      place for the normative definitions of default object sizes is in the
-      definitions for the relevant properties. These are the correct values,
-      though.</p>
+     <p class=note>Future properties that take an &lt;image> component value
+      are expected to define the <a href="#default-object-size"><i>default
+      object size</i></a> for themselves.</p>
     </div>
   </dl>
   <!-- ====================================================================== -->

css3-images/Overview.src.html

@@ -954,10 +954,8 @@ <h3 id="sizing-terms">
 					<dd>The <i>default object size</i> is a rectangle 300px wide and 150px
 					tall. [[!CSS21]]</dd>
 				</dl>
-				<p class=issue>The only reason these are examples is because the proper 
-				place for the normative definitions of default object sizes is in the 
-				definitions for the relevant properties.  These are the correct values,
-				though.</p>
+
+				<p class=note>Future properties that take an &lt;image> component value are expected to define the <i>default object size</i> for themselves.</p>
 			</div>
 		</dd>
 	</dl>