Obsolete hreflang and type content attributes on <area>

Fixes #232.

source

@@ -11895,8 +11895,8 @@ gave me some of the songs they wrote. I love sharing my music.</p>
 
   <p>The <dfn><code data-x="attr-link-hreflang">hreflang</code></dfn> attribute on the
   <code>link</code> element has the same semantics as the <span
-  data-x="attr-hyperlink-hreflang"><code>hreflang</code> attribute on <code>a</code> and
-  <code>area</code> elements</span>.</p>
+  data-x="attr-hyperlink-hreflang"><code>hreflang</code> attribute on the <code>a</code>
+  element</span>.</p>
 
   <p>The <dfn><code data-x="attr-link-type">type</code></dfn> attribute gives the <span>MIME
   type</span> of the linked resource. It is purely advisory. The value must be a <span>valid MIME
@@ -20376,12 +20376,12 @@ document.body.appendChild(wbr);</pre>
   being a hyperlink between the two.</p>
 
   <p>The <dfn><code data-x="attr-hyperlink-hreflang">hreflang</code></dfn> attribute on
-  <code>a</code> and <code>area</code> elements that create <span
-  data-x="hyperlink">hyperlinks</span>, if present, gives the language of the linked resource. It is
-  purely advisory. The value must be a valid BCP 47 language tag. <ref spec=BCP47>
-  <span w-nodev>User agents must not consider this attribute authoritative &mdash; upon
-  fetching the resource, user agents must use only language information associated with the resource
-  to determine its language, not metadata included in the link to the resource.</span></p>
+  <code>a</code> elements that create <span data-x="hyperlink">hyperlinks</span>, if present, gives
+  the language of the linked resource. It is purely advisory. The value must be a valid BCP 47
+  language tag. <ref spec=BCP47> <span w-nodev>User agents must not consider this attribute
+  authoritative &mdash; upon fetching the resource, user agents must use only language information
+  associated with the resource to determine its language, not metadata included in the link to the
+  resource.</span></p>
 
   <p>The <dfn><code data-x="attr-hyperlink-type">type</code></dfn> attribute, if present, gives the
   <span>MIME type</span> of the linked resource. It is purely advisory. The value must be a
@@ -21550,11 +21550,11 @@ interface <dfn>HTMLHyperlinkElementUtils</dfn> {
 
     <div w-nodev>
 
-    <p>The first <code>link</code>, <code>a</code>, or <code>area</code> element in the document (in
-    <span>tree order</span>) with the <code data-x="rel-alternate">alternate</code> keyword used with the <code
+    <p>The first <code>link</code> or <code>a</code> element in the document (in <span>tree
+    order</span>) with the <code data-x="rel-alternate">alternate</code> keyword used with the <code
     data-x="attr-hyperlink-type">type</code> attribute set to the value <code
-    data-x="">application/rss+xml</code> or the value <code data-x="">application/atom+xml</code> must
-    be treated as the default syndication feed for the purposes of feed autodiscovery.</p>
+    data-x="">application/rss+xml</code> or the value <code data-x="">application/atom+xml</code>
+    must be treated as the default syndication feed for the purposes of feed autodiscovery.</p>
 
     <div class="example">
      <p>The following <code>link</code> element gives the syndication
@@ -36646,8 +36646,6 @@ dictionary <dfn>TrackEventInit</dfn> : <span>EventInit</span> {
    <dd><code data-x="attr-hyperlink-download">download</code></dd>
    <dd><code data-x="attr-hyperlink-ping">ping</code></dd>
    <dd><code data-x="attr-hyperlink-rel">rel</code></dd>
-   <dd><code data-x="attr-hyperlink-hreflang">hreflang</code></dd>
-   <dd><code data-x="attr-hyperlink-type">type</code></dd>
    <dt><span data-x="concept-element-dom">DOM interface</span>:</dt><!--TOPIC:DOM APIs-->
    <dd>
 <pre class="idl">interface <dfn>HTMLAreaElement</dfn> : <span>HTMLElement</span> {
@@ -36659,7 +36657,6 @@ dictionary <dfn>TrackEventInit</dfn> : <span>EventInit</span> {
   [PutForwards=<span data-x="dom-DOMSettableTokenList-value">value</span>] readonly attribute <span>DOMSettableTokenList</span> <span data-x="dom-area-ping">ping</span>;
   attribute DOMString <span data-x="dom-area-rel">rel</span>;
   readonly attribute <span>DOMTokenList</span> <span data-x="dom-area-relList">relList</span>;
-  // <span data-x="attr-hyperlink-hreflang">hreflang</span> and <span data-x="attr-hyperlink-type">type</span> are not reflected
 };
 <span>HTMLAreaElement</span> implements <span>HTMLHyperlinkElementUtils</span>;</pre>
    </dd>
@@ -36773,17 +36770,15 @@ dictionary <dfn>TrackEventInit</dfn> : <span>EventInit</span> {
   <code>area</code> element, as described in the next section, the <code
   data-x="attr-hyperlink-href">href</code>, <code data-x="attr-hyperlink-target">target</code>, <code
   data-x="attr-hyperlink-download">download</code>, and <code data-x="attr-hyperlink-ping">ping</code>
-  attributes decide how the link is followed. The <code data-x="attr-hyperlink-rel">rel</code>, <code
-  data-x="attr-hyperlink-hreflang">hreflang</code>, and <code data-x="attr-hyperlink-type">type</code>
-  attributes may be used to indicate to the user the likely nature of the target resource before the
+  attributes decide how the link is followed. The <code data-x="attr-hyperlink-rel">rel</code>
+  attribute may be used to indicate to the user the likely nature of the target resource before the
   user follows the link.</p>
 
   </div>
 
   <p>The <code data-x="attr-hyperlink-target">target</code>, <code
   data-x="attr-hyperlink-download">download</code>, <code data-x="attr-hyperlink-ping">ping</code>,
-  <code data-x="attr-hyperlink-rel">rel</code>, <code
-  data-x="attr-hyperlink-hreflang">hreflang</code>, and <code data-x="attr-hyperlink-type">type</code>
+  and <code data-x="attr-hyperlink-rel">rel</code>
   attributes must be omitted if the <code data-x="attr-hyperlink-href">href</code> attribute is not
   present.</p>
 
@@ -110697,6 +110692,12 @@ if (s = prompt('What is your name?')) {
    <dt><dfn><code data-x="attr-form-accept">accept</code></dfn> on <code>form</code> elements</dt>
    <dd><p>Use the <code data-x="attr-input-accept">accept</code> attribute directly on the <code>input</code> elements instead.</p></dd>
 
+   <dt><dfn><code data-x="attr-area-hreflang">hreflang</code></dfn> on <code>area</code>
+   elements</dt>
+   <dt><dfn><code data-x="attr-area-type">type</code></dfn> on <code>area</code> elements</dt>
+   <dd><p>These attributes do not do anything useful, and for historical reasons there are no
+   corresponding IDL attributes on <code>area</code> elements. Omit them altogether.</p></dd>
+
    <dt><dfn><code data-x="attr-area-nohref">nohref</code></dfn> on <code>area</code> elements</dt>
    <dd><p>Omitting the <code data-x="attr-hyperlink-href">href</code>
    attribute is sufficient; the <code
@@ -112919,8 +112920,6 @@ if (s = prompt('What is your name?')) {
          <code data-x="attr-hyperlink-download">download</code>;
          <code data-x="attr-hyperlink-ping">ping</code>;
          <code data-x="attr-hyperlink-rel">rel</code>;
-         <code data-x="attr-hyperlink-hreflang">hreflang</code>;
-         <code data-x="attr-hyperlink-type">type</code></td>
      <td><code>HTMLAreaElement</code></td>
     </tr>
 
@@ -115297,7 +115296,6 @@ if (s = prompt('What is your name?')) {
     <tr>
      <th> <code data-x="">hreflang</code>
      <td> <code data-x="attr-hyperlink-hreflang">a</code>;
-          <code data-x="attr-hyperlink-hreflang">area</code>;
           <code data-x="attr-link-hreflang">link</code>
      <td> Language of the linked resource
      <td> Valid BCP 47 language tag
@@ -115796,7 +115794,6 @@ if (s = prompt('What is your name?')) {
     <tr>
      <th> <code data-x="">type</code>
      <td> <code data-x="attr-hyperlink-type">a</code>;
-          <code data-x="attr-hyperlink-type">area</code>;
           <code data-x="attr-link-type">link</code>
      <td> Hint for the type of the referenced resource
      <td> <span>Valid MIME type</span>