Remove comment.

ball.lua

@@ -4,8 +4,6 @@ class("Ball").extends(Pixie)
 
 function Ball:init(width, height, color, x, y)
    Ball.super.init(self, width, height, color, x, y)
-   -- trying to use a table / array for the direction vector doesn't work for bizarre reasons...
-   -- it fails on the init() call at runtime.
    self.dirX = -1
    self.dirY = 1
    self.speed = 3