This commit removes the block policy estimator. It's currently basically useless,
and the algorithm for determining minimum fee isn't correct either. We will replace this
estimator using something that examines the active mempool.
Depends on D2037
make VERBOSE=1 check && ./test/functional/test_runner.py
Build Bitcoin-ABC / Diffs / Bitcoin-ABC Diff Testing started.
Build Bitcoin-ABC / Diffs / Bitcoin-ABC Diff Testing passed.
Remove writing/reading of fee stats.
Build Bitcoin-ABC / Diffs / Bitcoin-ABC Diff Testing failed.
Remove test_framework dependency on silly file
Include change to docs
Clean up some unnecessary globals
Remove last vestigates of block policy estimator
Remove an extraneous whitespace
Delete yet another vestige