Editorial: remove API URL character encoding

This makes it clearer that only when Document objects are involved encoding-parsing a URL will do something special.

Fixes #9728.

source

@@ -7091,9 +7091,17 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
   <span>URL</span>.</p>
 
   <ol>
-   <li><p>Let <var>encoding</var> be <var>environment</var>'s <span data-x="document's character
-   encoding">character encoding</span>, if <var>environment</var> is a <code>Document</code> object;
-   otherwise <var>environment</var>'s <span>API URL character encoding</span>.</p></li>
+   <li><p>Let <var>encoding</var> be <span>UTF-8</span>.</p></li>
+
+   <li><p>If <var>environment</var> is a <code>Document</code> object, then set <var>encoding</var>
+   to <var>environment</var>'s <span data-x="document's character encoding">character
+   encoding</span>.</p></li>
+
+   <li><p>Otherwise, if <var>environment</var>'s <span>relevant global object</span> is a
+   <code>Window</code> object, set <var>encoding</var> to <var>environment</var>'s <span>relevant
+   global object</span>'s <span data-x="concept-document-window">associated
+   <code>Document</code></span>'s <span data-x="document's character encoding">character
+   encoding</span>.</p></li>
 
    <li><p>Let <var>baseURL</var> be <var>environment</var>'s <span data-x="document base URL">base
    URL</span>, if <var>environment</var> is a <code>Document</code> object; otherwise
@@ -87951,13 +87959,6 @@ interface <dfn interface>BarProp</dfn> {
       <code>Document</code></span>.</p>
      </dd>
 
-     <dt>The <span>API URL character encoding</span></dt>
-     <dd>
-      <p>Return the current <span data-x="document's character encoding">character encoding</span>
-      of <var>window</var>'s <span data-x="concept-document-window">associated
-      <code>Document</code></span>.</p>
-     </dd>
-
      <dt>The <span>API base URL</span></dt>
      <dd>
       <p>Return the current <span data-x="document base URL">base URL</span> of <var>window</var>'s
@@ -102163,13 +102164,6 @@ new PaymentRequest(&hellip;); // Allowed to use
     <p>A <span>module map</span> that is used when importing JavaScript modules.</p>
    </dd>
 
-   <dt>An <dfn export for="environment settings object">API URL character encoding</dfn></dt>
-
-   <dd>
-    <p>A character encoding used to encode URLs by APIs called by scripts that use this <span>environment
-    settings object</span>.</p>
-   </dd>
-
    <dt>An <dfn export for="environment settings object">API base URL</dfn></dt>
 
    <dd>
@@ -112115,9 +112109,8 @@ dictionary <dfn dictionary>EventSourceInit</dfn> {
 
    <li><p>Let <var>settings</var> be <var>ev</var>'s <span>relevant settings object</span>.
 
-   <li><p>Let <var>urlRecord</var> be the result of <span data-x="URL parser">parsing</span>
-   <var>url</var> with <var>settings</var>'s <span>API base URL</span> and <var>settings</var>'s
-   <span>API URL character encoding</span>.</p></li>
+   <li><p>Let <var>urlRecord</var> be the result of <span>encoding-parsing a URL</span> given
+   <var>url</var>, relative to <var>settings</var>.</p></li>
 
    <li><p>If <var>urlRecord</var> is failure, then throw a <span>"<code>SyntaxError</code>"</span>
    <code>DOMException</code>.</p></li>
@@ -115105,11 +115098,6 @@ interface <dfn interface>SharedWorkerGlobalScope</dfn> : <span>WorkerGlobalScope
       data-x="concept-WorkerGlobalScope-module-map">module map</span>.</p>
      </dd>
 
-     <dt>The <span>API URL character encoding</span></dt>
-     <dd>
-      <p>Return <span>UTF-8</span>.</p>
-     </dd>
-
      <dt>The <span>API base URL</span></dt>
      <dd>
       <p>Return <var>worker global scope</var>'s <span
@@ -116313,11 +116301,6 @@ interface <dfn interface>WorkletGlobalScope</dfn> {};</code></pre>
       data-x="concept-WorkletGlobalScope-module-map">module map</span>.</p>
      </dd>
 
-     <dt>The <span>API URL character encoding</span></dt>
-     <dd>
-      <p>Return <span>UTF-8</span>.</p>
-     </dd>
-
      <dt>The <span>API base URL</span></dt>
      <dd>
       <p>Return <var>inheritedAPIBaseURL</var>.</p>