Revert "Menu: Document _closeOnDocumentClick() extension point."

This isn't part of the 1.10 API.

This reverts commit 1bcb2ab.

Author: scottgonzalez

entries/menu.xml

@@ -227,22 +227,6 @@
 		</method>
 		<xi:include href="../includes/widget-method-widget.xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>
 	</methods>
-	<extension-points>
-		<method name="_closeOnDocumentClick" return="Boolean">
-			<desc>
-				Method that determines whether clicks on the document should close any open menus. By default, menus are closed unless the click occurred a menu.
-			</desc>
-			<argument name="event" type="Event"/>
-			<example>
-				<desc>Never close menus on document click.</desc>
-				<code><![CDATA[
-_closeOnDocumentClick: function( event ) {
-	return false;
-}
-]]></code>
-			</example>
-		</method>
-	</extension-points>
 	<events>
 		<event name="blur">
 			<desc>