Drop the “Feature Policy integration” section

Feature Policy is now known as Permissions Policy and sync-xhr is no longer part of it. It is now part of Document Policy. See #295 for follow-up work.

xhr.bs

@@ -103,12 +103,11 @@ archives:
 <p>This specification depends on the Infra Standard. [[!INFRA]]
 
 <p>This specification uses terminology from DOM, DOM Parsing and Serialization, Encoding,
-Feature Policy, Fetch, File API, HTML, URL, Web IDL, and XML.
+Fetch, File API, HTML, URL, Web IDL, and XML.
 
 [[!DOM]]
 [[!DOM-PARSING]]
 [[!ENCODING]]
-[[!FEATURE-POLICY]]
 [[!FETCH]]
 [[!FILEAPI]]
 [[!HTML]]
@@ -922,10 +921,6 @@ return <a>this</a>'s <a>cross-origin credentials</a>.
   <p>Otherwise, if <a>this</a>'s <a>synchronous flag</a> is set:
 
   <ol>
-   <li><p>If <a>this</a>'s <a>relevant settings object</a> has a <a>responsible document</a> which
-   is not <a>allowed to use</a> the "<code><a>sync-xhr</a></code>" feature, then run
-   <a>handle response end-of-body</a> for <a>this</a> and return.
-
    <li><p>Let <var>processedResponse</var> be false.
 
    <li>
@@ -1579,12 +1574,6 @@ steps are:
 </table>
 
 
-<h3 id=feature-policy-integration>Feature Policy integration</h3>
-
-<p>This specification defines a <a>policy-controlled feature</a> identified by the string
-"<code><dfn>sync-xhr</dfn></code>". Its <a>default allowlist</a> is <code>*</code>.
-
-
 <h2 id=interface-formdata>Interface {{FormData}}</h2>
 
 <pre class=idl>