Drop the “Feature Policy integration” section

See #321 and
#295

xhr.bs

@@ -103,7 +103,7 @@ 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]]
@@ -1579,12 +1579,6 @@ 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>