PhpStorm inspections

Fixed some minor bugs and dropped some obsolete code

pocketmine\level\generator namespace is ignored in this commit

src/pocketmine/entity/Entity.php

@@ -1610,6 +1610,7 @@ abstract class Entity extends Location implements Metadatable{
 	 * @param int   $id
 	 * @param int   $type
 	 * @param mixed $value
+	 * @param bool  $send
 	 *
 	 * @return bool
 	 */