[css-shadow-parts-1] Migrate issues from spec to github.

These are obsolete or potential enhancements and are now captured in

Author: fergald

css-shadow-parts-1/Overview.bs

@@ -160,8 +160,6 @@ To calculate the part element map of a shadow root, |outerRoot|:
 </ol>
 
 
-Issue: There is no need for the part element map values to be ordered, can we drop that?
-
 Naming a Shadow Element: the <{html-global/part}> attribute {#part-attr}
 ------------------------------------------------------------------------
 
@@ -214,14 +212,6 @@ Each part mapping is one of:
 
 Note: It's okay to map a sub-part to several names.
 
-Issue(w3c/csswg-drafts#2411): Decide whether to allow "ident1 : ident2 ident3 ..."
-as shorthand for "ident1 : ident2, ident1 : ident3, ...".
-
-Issue(w3c/csswg-drafts#2411): Decide whether to allow wild-card forwarding,
-e.g exportparts="button-* buttons".
-Consider excluding sub-parts that have been explicitly forwarded.
-Consider a mechanism to exclude sub-parts without forwarding them.
-
 <pre class="example">
 &lt;style&gt;
   c-e<b>::part(textspan)</b> { color: red; }
@@ -318,8 +308,7 @@ whose associated element is the context object
 and whose associated attribute’s local name is part.
 The token set of this particular DOMTokenList object are also known as the element’s parts.
 
-Issue(w3c/csswg-drafts#2414): Define this as a superglobal in the DOM spec.
-Issue(w3c/csswg-drafts#2414): Define IDL for structured setting and getting of `exportparts`.
+Issue(w3c/csswg-drafts#3424): Define this as a superglobal in the DOM spec.
 
 Microsyntaxes for parsing {#parsing}
 ==============================================