PhpStorm inspections

Fixed some minor bugs and dropped some obsolete code

pocketmine\level\generator namespace is ignored in this commit

src/pocketmine/command/defaults/ParticleCommand.php

@@ -123,8 +123,13 @@ class ParticleCommand extends VanillaCommand{
 	}
 
 	/**
-	 * @param $name
+	 * @param string   $name
 	 *
+	 * @param Vector3  $pos
+	 * @param int      $xd
+	 * @param float    $yd
+	 * @param float    $zd
+	 * @param int|null $data
 	 * @return Particle
 	 */
 	private function getParticle($name, Vector3 $pos, $xd, $yd, $zd, $data){