reverted commit about aliases in debug and gii module

not needed when installed via composer and application config loads
composer extensions correctly

extensions/debug/Module.php

@@ -53,7 +53,6 @@ class Module extends \yii\base\Module
 
 	public function init()
 	{
-		Yii::setAlias('@yii/debug', __DIR__);
 		parent::init();
 		$this->dataPath = Yii::getAlias($this->dataPath);
 		$this->logTarget = Yii::$app->getLog()->targets['debug'] = new LogTarget($this);

extensions/gii/Module.php

@@ -96,7 +96,6 @@ class Module extends \yii\base\Module
 	 */
 	public function init()
 	{
-		Yii::setAlias('@yii/gii', __DIR__);
 		parent::init();
 		foreach (array_merge($this->coreGenerators(), $this->generators) as $id => $config) {
 			$this->generators[$id] = Yii::createObject($config);