Extension docs: Cleanup after there's only one version.

chrome/common/extensions/docs/templates/articles/declare_permissions.html

 <h1>Declare Permissions</h1>
 
 <p>
 To use most chrome.* APIs,
 your extension or app must declare its intent in the
 "permissions" field of the
 <a href="manifest.html">manifest</a>.
 Each permission can be either one of a list of known strings
 (such as "geolocation")
 or a <a href="match_patterns.html">match pattern</a>
@@ skipping 180 matching lines @@
 {{^is_apps}}
 <tr>
   <td> "cookies" </td>
   <td> Required if the extension uses the
        <a href="cookies.html">chrome.cookies</a> module. </td>
 </tr>
 {{/is_apps}}
 <tr>
   <td> "experimental" </td>
   <td> Required if the extension or app uses any
-       <a href="http://code.google.com/chrome/extensions/dev/experimental.html">chrome.experimental.* APIs</a>.</td>
+       <a href="experimental.html">chrome.experimental.* APIs</a>.</td>
 </tr>
 {{^is_apps}}
 <tr>
   <td id="fileBrowserHandler"> "fileBrowserHandler" </td>
   <td> Required if the extension uses the
        <a href="fileBrowserHandler.html">fileBrowserhandler</a> module. </td>
 </tr>
 {{/is_apps}}
 {{?is_apps}}
 <tr>
@@ skipping 204 matching lines @@
 {{?is_apps}}
 <tr>
   <td id="webview"> "webview" </td>
   <td> Required if the app uses the
        <a href="webview_tag.html">Webview Tag</a> to embed live content
        from the web in the packaged app.</td>
 </tr>
 {{/is_apps}}
 </tr>
 </table>