chore: initial cbs scene clean-up

sonic-radiance.love/scenes/battlesystem/init.lua

@@ -17,11 +17,7 @@ function BattleSystem:new(battleData)
   self.assets:batchImport("assets.battle")
 
   self:playMusic(battleData.music)
-
   self:initManagers(battleData)
-
-  self:register()
-
   self:startBattle()
 
   self.screen = nil
@@ -86,8 +82,7 @@ function BattleSystem:update(dt)
 end
 
 function BattleSystem:draw()
-  self.world:draw()
-  self.turns:draw()
+  BattleSystem.super.draw(self)
   if (self.screen ~= nil) then
     self.screen:draw()
   end