Revert "Factoids & Karma & MessageParser & MoobotFactoids & QuoteGrabs: Fix Pypy3 support."

This reverts commit 30e03a542a4072327be006f8d607e95831850a05.
Factoids & Karma & MessageParser & MoobotFactoids & QuoteGrabs: Fix Pypy3 support (without breaking Python 2 support).