I think so would empty it. Not because it has dead worms in it, but because the manure should be composted by now. I mean why did the worms die? My bet is because there wasn't anymore food for them? Or did the whole ting dry out? I leave my worm in unattended for months at a time, and it doesn't bother my worms at all - as long as there is plenty of food (primarily
carbon) and they don't dry out that is.
The worm tea is usually a sign of excess
water - the wormbin should be moist but not wet. Sometimes you need to add a lot of water to keep it moist, and catching the worm tea is a great byproduct of that - but I wouldn't make it from the finished
compost, because you would only be washing nutrients out.