Destroyed units are not removed at the end of turn

[LeFiz]

According to match resolution order a unit that gets sapped to negative energy should be removed at step 5 of resolution. It should not be there at the start of the next turn, but in reality it is (it is removed the very next turn though).

Edit: according to the comments in the code it's a feature so that the user can see the destroyed unit. But as was pointed out on discord: the dead units still generate points (as they are in unit_mask and therefore in compute_unit_counts_map) and the agent still generates actions for these units.

Sapped unit is still there with negative energy after turn resolves:

[StoneT2000]

closed by #39