Remove deprecated module-level assertion functions from twisted.trial.unittest
|Reported by:||Jean-Paul Calderone||Owned by:||Jean-Paul Calderone|
twisted.trial.unittest.assertTrue and friends have been deprecated since prior to Twisted 2.3 (r14549). Nothing in Twisted uses them anymore. They present a maintenance burden now (as part of the Python 3 port). Let's remove them.