Remove unused captured variable

Removed in #118 when I've changed blog post preview to be loaded in to an iframe and not with an AJAX call

Author: spaze

site/app/Admin/Presenters/templates/Blog/edit.latte

@@ -25,7 +25,6 @@
 		<tbody><tr><th>{label allowedTags /}</th><td>{input allowedTags}</td></tr></tbody>
 		<tbody><tr><th>{label omitExports: /}</th><td>{input omitExports:}</td></tr></tbody>
 		<tbody><tr><th>{label editSummary /}</th><td>{input editSummary}<br><small>Shrnutí editace bude u článku zobrazeno jako aktualizace, ponechte prázdné pro malé editace</small></td></tr></tbody>
-		{capture $link}{link preview}{/capture}
 		<tr><td></td><td class="short"><p>{input submit} {input preview id => preview-button, class => lighter, formtarget => preview}</p></td></tr>
 	</table>
 {/form}