doc/go1.13: remove bytes TODO since it does not require a release note

Change-Id: I8c19c6df6fec74dcc8c3bfdc667576ea00e86ec1
Reviewed-on: https://go-review.googlesource.com/c/go/+/183617Reviewed-by: Katie Hockman <katie@golang.org>

doc/go1.13.html

@@ -359,10 +359,6 @@ TODO
 
 <dl id="bytes"><dt><a href="/pkg/bytes/">bytes</a></dt>
   <dd>
-    <p><!-- CL 161760 -->
-      TODO: <a href="https://golang.org/cl/161760">https://golang.org/cl/161760</a>: hoist error creation out of function
-    </p>
-
     <p>
       The new <a href="/pkg/bytes/#ToValidUTF8"><code>ToValidUTF8</code></a> function returns a
       copy of a given byte slice with each run of invalid UTF-8 byte sequences replaced by a given slice.