Fixed some trailing whitespace

$ shopt -s globstar
 $ sed -i 's/[ \t]*$//' src/pocketmine/*/**.php

:P

src/pocketmine/level/Location.php

@@ -61,7 +61,7 @@ class Location extends Position{
 
 	/**
 	 * Return a Location instance
-	 * 
+	 *
 	 * @return Location
 	 */
 	public function asLocation() : Location{