spawn: unset VIRTUAL_ENV
spawn: unset VIRTUAL_ENV

see comment for details.

Closes #1556

Signed-off-by: Tycho Andersen <6b523322678240882acbb4da5312a12d8cd0082d@tycho.ws>

qtile/qtile,ramnes/qtile,tych0/qtile,tych0/qtile,qtile/qtile,ramnes/qtile