Editorial: use "pull from bytes" algorithm

Introduced in whatwg/streams#1263.

Fixes #1610.

fetch.bs

@@ -6122,7 +6122,7 @@ optional boolean <var>forceNewConnection</var> (default false), run these steps:
   </ol>
 
  <li>
-  <p>Let |buffer| be an empty buffer that can have bytes appended to it.
+  <p>Let |buffer| be an empty [=byte sequence=].
 
   <p class="note">This represents an internal buffer inside the network layer of the user agent.
 
@@ -6146,28 +6146,7 @@ optional boolean <var>forceNewConnection</var> (default false), run these steps:
       [=task destination=].
 
       <ol>
-       <li><p>Let |available| be the size of |buffer|.
-
-       <li><p>Let |desiredSize| be |available|.
-
-       <li><p>If |stream|'s [=ReadableStream/current BYOB request view=] is non-null, then set
-       |desiredSize| to |stream|'s [=ReadableStream/current BYOB request view=]'s
-       [=BufferSource/byte length=].
-
-       <li><p>Let |extractSize| be the smaller value of |available| and |desiredSize|.
-
-       <li><p>Let <var>bytes</var> be the result of extracting |extractSize| of bytes from
-       <var>buffer</var>.
-
-       <li><p>If |stream|s [=ReadableStream/current BYOB request view=] is non-null, then
-       [=ArrayBufferView/write=] |bytes| into |stream|'s
-       [=ReadableStream/current BYOB request view=], and set |view| to |stream|'s
-       [=ReadableStream/current BYOB request view=].
-
-       <li>Otherwise, set |view| to the result of [=ArrayBufferView/create|creating=] a
-       {{Uint8Array}} from |bytes| in |stream|'s [=relevant Realm=].
-
-       <li><p>[=ReadableStream/Enqueue=] |view| into |stream|.
+       <li><p>[=ReadableStream/Pull from bytes=] |buffer| into |stream|.
 
        <li><p>If |stream| is [=ReadableStream/errored=], then [=fetch controller/terminate=]
        |fetchParams|'s [=fetch params/controller=].