Remove unused code

[ggravlingen]

Closes #463

[ggravlingen]

This is the only place where I have seen devices been used. I feel it's based on an incorrect assumption that you would want to control a device from a smart task.

[MartinHjelmare]

This is calling the set_dimmer method in the smart_task module. But it looks like you can do the same via task_control.tasks. Is there a difference in what StartActionItem instances are enumerated in the two different lists?

[ggravlingen]

To be honest, I can't remember what caused me to go for this ambiguous design pattern. The order seem to have been the same in both occurances as we loop over self.raw.root_start_action:

TaskControl:

return [
  StartActionItem(self._task, idx, self.state, self.path, self.raw)
  for idx in range(len(self.raw.root_start_action))
]

StartAction:

[
  StartActionItem(self.smart_task, i, self.state, self.path, self.raw)
  for i in range(len(self.raw.root_start_action))
]

[MartinHjelmare]

Then I think we can remove this as there's an alternative in place.