Editorial: remove inaccurate qualifier

This specification uses the List type from WHATWG Infra [1]. It does so
indirectly, working with a derivative which it refers to as a "JSON
List." This type is not defined, but because its usage matches that of
the List, the qualifier "JSON" appears to be superfluous.

Remove the qualifier to clarify the type of the specification values.

[1] https://infra.spec.whatwg.org/#lists

index.html

@@ -1769,15 +1769,15 @@ <h3>Processing capabilities</h3>
 
   <ol>
    <li><p>If <var>all first match capabilities</var> is <a>undefined</a>,
-    set the value to a JSON <a>List</a> with a single entry of an empty JSON <a>Object</a>.
+    set the value to a <a>List</a> with a single entry of an empty JSON <a>Object</a>.
 
    <li><p>If <var>all first match capabilities</var> is not a
-   JSON <a>List</a> with one or more entries, return <a>error</a>
+   <a>List</a> with one or more entries, return <a>error</a>
    with <a>error code</a> <a>invalid argument</a>.
   </ol>
 
  <li><p>Let <var>validated first match capabilities</var> be an empty
-  JSON <a>List</a>.
+  <a>List</a>.
 
  <!-- Validate all entries first so we fail as quickly as possible -->
  <li><p>For each <var>first match capabilities</var> corresponding
@@ -3453,7 +3453,7 @@ <h3><dfn>Get Window Handles</dfn></h3>
 <p>The <a>remote end steps</a> are:
 
 <ol>
- <li><p>Let <var>handles</var> be a JSON <a>List</a>.
+ <li><p>Let <var>handles</var> be a <a>List</a>.
 
  <li><p>For each <a>top-level browsing context</a> in the <a>remote end</a>,
   push the associated <a>window handle</a> onto <var>handles</var>.
@@ -4617,7 +4617,7 @@ <h3 id=element-retrieval>Retrieval</h3>
   is less than <var>end time</var> return to step 4. Otherwise,
   continue to the next step.
 
- <li><p>Let <var>result</var> be an empty JSON <a>List</a>.
+ <li><p>Let <var>result</var> be an empty <a>List</a>.
 
  <li><p>For each <var>element</var> in <var>elements returned</var>,
   append the <a>web element reference object</a> for <var>element</var>,
@@ -7147,7 +7147,7 @@ <h3><dfn>Get All Cookies</dfn></h3>
 
  <li><p><a>Handle any user prompts</a>, and return its value if it is an <a>error</a>.
 
- <li><p>Let <var>cookies</var> be a new JSON <a>List</a>.
+ <li><p>Let <var>cookies</var> be a new <a>List</a>.
 
  <li><p>For each <var>cookie</var> in <a>all associated cookies</a> of
   the <a>current browsing context</a>’s <a>active document</a>: