Removing the magical addition of SessionComponent to components array…

…. This makes components more declarative, and removes magic that cannot be undone by the end developer.

cake/libs/controller/component.php

@@ -185,9 +185,6 @@ function shutdown(&$controller) {
 	function _loadComponents(&$object, $parent = null) {
 		$base = $this->__controllerVars['base'];
 		$normal = Set::normalize($object->components);
-		if ($parent == null) {
-			$normal = Set::merge(array('Session' => null), $normal);
-		}
 		foreach ((array)$normal as $component => $config) {
 			$plugin = isset($this->__controllerVars['plugin']) ? $this->__controllerVars['plugin'] . '.' : null;
 			list($plugin, $component) = pluginSplit($component, true, $plugin);

cake/libs/controller/controller.php

@@ -229,7 +229,7 @@ class Controller extends Object {
  * @access public
  * @link http://book.cakephp.org/view/53/components-helpers-and-uses
  */
-	var $components = array();
+	var $components = array('Session');
 
 /**
  * The name of the View class this controller sends output to.