Enable tests for PT samplers
Created by: wdphy16
The tests for PT samplers can pass on my machine. Let's see if they're really working now.
MetropolisPtSampler.__repr__
and __str__
are removed. Previously we did not rename reset_chain
to reset_chains
so they would cause errors. I checked that they actually did not override anything, so I removed them to reduce the future maintenance cost.