Don't verify range values in range responses

User-agents don't actually perform these verifications.
The only important verification is origin of responses.

See whatwg#7655 (comment)

source

@@ -2557,10 +2557,6 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
        <li><dfn data-x="concept-response-location-url" data-x-href="https://fetch.spec.whatwg.org/#concept-response-location-url">location URL</dfn></li>
        <li><dfn data-x="concept-response-timing-info" data-x-href="https://fetch.spec.whatwg.org/#concept-response-timing-info">timing info</dfn></li>
        <li><dfn data-x="concept-response-service-worker-timing-info" data-x-href="https://fetch.spec.whatwg.org/#response-service-worker-timing-info">service worker timing info</dfn></li>
-       <li>
-        <dfn data-x-href="https://wicg.github.io/background-fetch/#extract-content-range-values">extract content-range values</dfn>
-        <!-- TODO: move this to FETCH -->
-       </li>
       </ul>
      </li>
      <li>
@@ -34685,19 +34681,21 @@ interface <dfn interface>MediaError</dfn> {
   </ol>
 
   <p>To <dfn>verify a media response</dfn> given a <span data-x="concept-response">response</span>
-  <var>response</var>, a <span>media resource</span> <var>resource</var>, and
-  "<code data-x="">entire resource</code>" or a
-  (number, number or "<code data-x="">until end</code>") tuple <var>byteRange</var>:</p>
+  <var>response</var>, and a <span>media resource</span> <var>resource</var>:</p>
 
   <ol>
    <li><p>If <var>response</var> is a <span>network error</span>, then return false.</p></li>
 
-   <li><p>If <var>byteRange</var> is "<code data-x="">entire resource</code>", then return
-   true.</p></li>
-
    <li><p>Let <var>internalResponse</var> be <var>response</var>'s
    <span>unsafe response</span>.</p></li>
 
+   <li>
+    <p>If <var>internalResponse</var>'s <span data-x="concept-response-status">status</span> is
+    200, then return true.</p>
+
+    <p class="note">Range headers may be ignored, returning the whole resource instead.</p>
+   </li>
+
    <li><p>If <var>internalResponse</var>'s <span data-x="concept-response-status">status</span> is
    not 206, then return false.</p></li>
 
@@ -34733,14 +34731,6 @@ interface <dfn interface>MediaError</dfn> {
     by being patched together with other responses from different origins.</p>
    </li>
 
-   <li><p>Let (<var>start</var>, <var>end</var>) be the result of
-   <span data-x="extract content-range values">extracting content-range values</span> from
-   <var>internalResponse</var>.</p></li>
-
-   <li><p>If <var>start</var> is not <var>byteRange</var>[0], or if
-   <var>byteRange</var>[1] is neither "<code data-x="">until end</code>" or <var>end</var>,
-   return false.</p></li>
-
    <li><p>Return true.</p></li>
   </ol>
 
@@ -34879,8 +34869,8 @@ interface <dfn interface>MediaError</dfn> {
          </li>
 
          <li><p>If the result of <span data-x="verify a media response">verifying</span>
-         <var>response</var> given the <var>current media resource</var> and
-         <var>byteRange</var> is false, then call <var>finalize</var>. Otherwise,
+         <var>response</var> given the <var>current media resource</var>is false, then call
+         <var>finalize</var>. Otherwise,
          <span data-x="body-incrementally-read">incrementally read</span> <var>response</var>'s
          <span data-x="concept-response-body">body</span> given <var>updateMedia</var>,
          <var>processEndOfMedia</var>, <var>finalize</var>, and <var>global</var>.</p></li>