Resource extractor health is unnecessary

Building 6 extractors to rotate 3 and 3 every time they collect resources is not a big investment.

But it is annoying to have to choose the extractor at the bench to let the other rest every cycle.

Mechanically, this is not different than removing extractor health/damage and resend the same extractor without the extra steps.

Resource extraction is not a very important part of the game anyway, but this could be a small QOL to consider.

Thank you!