[Pkg-privacy-maintainers] onionbalance is marked for autoremoval from testing

[Debian testing autoremoval watch]

onionbalance 0.1.8-3 is marked for autoremoval from testing on 2018-08-28

It (build-)depends on packages with these RC bugs:
903860: python3-stem: File "/usr/lib/python3/dist-packages/stem/util/test/test_tools.py", line 151 / self.method.async = self                                                            /              ^                                                                   /SyntaxError: invalid syntax