MINOR Removed invalid deprecation note

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@91589 467b73ca-7a2a-4603-9d3b-597d59a354a9

core/control/ContentNegotiator.php

@@ -166,14 +166,10 @@ static function enable() {
 		self::$enabled = true;
 	}
 
-	/**
-	 * @deprecated in 2.3
-	 */
 	static function disable() {
 		self::$enabled = false;
 	}
 
-
 	/**
 	 * Returns true if negotation is enabled for the given response.
 	 * By default, negotiation is only enabled for pages that have the xml header.
@@ -189,5 +185,4 @@ static function enabled_for($response) {
 	}
 
 }
-
 ?>