Queue: Disable inProgress map until it's used

The inProgress map is essentially just a memory leak if we don't report
having finished the given task. As we're not currently using it, it's
best to simply turn it off until we go to use it.
Disable verbose logging due to the impact on performance

A test of 10,000 queue pushes and pops takes 45.2 seconds with verbose
logging but only takes 15.1 seconds when disabled.
Naive first test of the system

+ 10k sequential push + pop ops take about 15.1 secs on my laptop
+ Can't co-exist with the existing test as servers can't be shut down
+ TODO: Make windowed requests from multiple clients