Make bpython.urwid's twisted support work with urwid 1.0.0 and up.
Make bpython.urwid's twisted support work with urwid 1.0.0 and up.

This just disables a workaround for a bug fixed in newer urwids. The
workaround involved copying code from urwid, and that code changed,
causing our workaround to break things.

kdart/bpython,wevial/bpython,aktorion/bpython,wevial/bpython,aktorion/bpython,kdart/bpython