Remove incomplete and redundant step for @type and @included in expansion algorithm.

Fixes #178.

Author: gkellogg

index.html

@@ -2382,8 +2382,6 @@ <h3>Algorithm</h3>
                   (unless <a>processing mode</a> is `json-ld-1.0`)</span>,
                   a <a data-link-for="JsonLdErrorCode">colliding keywords</a>
                   error has been detected and processing is aborted.</li>
-                <li class="changed">If <var>result</var> already has an <var>expanded property</var> <a>entry</a>,
-                  for `@included` or `@type`.</li>
                 <li>If <var>expanded property</var> is <code>@id</code> and
                   <var>value</var> is not a <a>string</a>, an
                   <a data-link-for="JsonLdErrorCode">invalid @id value</a>