Updating the samples page to reflect the examples that have been retired.

src/site/samples/anagram/index.markdown

----
-layout: default
-title: Moving Elements within the DOM Tree
-live_example_url: /docs/tutorials/add-elements/examples/anagram/anagram.html">
-header:
-  css: ["/samples/samples.css"]
----
-
-## {{ page.title }}
-
-Form a word by clicking the letter tiles.
-
-This app shows how to programmatically move an element on the page.
-
-To move an element on the page, change its parent element. An element can have
-only one parent, so changing the parent moves the element in the DOM tree. In
-this example, when you click on a tile, the click handler changes the tile’s
-parent.
-
-Read this [tutorial](/docs/tutorials/add-elements/#moving-elements) for
-more detail, or read the
-[source](https://github.com/dart-lang/dart-tutorials-samples/tree/master/anagram).
-
-<iframe class="running-app-frame"
-        style="height:400px;width:100%;"
-        src="{{page.live_example_url}}">
-</iframe>
-
-See all [samples](/samples/).