fix

Author: sadym-chromium

fetch.bs

@@ -5904,12 +5904,6 @@ run these steps:
      <var>httpRequest</var>'s <a for=request>header list</a>.
     </ol>
 
-   <li><p>If <var>httpRequest</var>'s <a for=request>header list</a>
-   <a for="header list">does not contain</a> `<code>User-Agent</code>`, then user agents should
-   <a for="header list">append</a> (`<code>User-Agent</code>`,
-   <a>default `<code>User-Agent</code>` value</a>) to <var>httpRequest</var>'s
-   <a for=request>header list</a>.
-
    <li><p>If <var>httpRequest</var>'s <a for=request>cache mode</a> is "<code>default</code>" and
    <var>httpRequest</var>'s <a for=request>header list</a> <a for="header list">contains</a>
    `<code>If-Modified-Since</code>`,