Docs: Remove data-position-to from the popup attributes (data-attributes.html)

Author: MauriceG

docs/api/data-attributes.html

@@ -495,12 +495,6 @@ <h2><a href="../pages/popup/">Popup</a></h2>
 					<th>data-overlay-theme</th>
 					<td>swatch letter (a-z) - default null: transparent background</td>
 				</tr>
-				<tr>
-					<th>data-position-to</th>
-					<td><strong>origin</strong> (centers the popup above the calling element)<br />
-						window (centers the popup within the window)<br />
-						selector (centers the popup above a named visible element)</td>
-				</tr>
 				<tr>
 					<th>data-shadow</th>
 					<td><strong>true</strong> | false</td>