Remove unused sys import.
Remove unused sys import.

pvtodorov/indra,sorgerlab/indra,bgyori/indra,bgyori/indra,sorgerlab/belpy,pvtodorov/indra,johnbachman/belpy,pvtodorov/indra,bgyori/indra,johnbachman/belpy,pvtodorov/indra,johnbachman/indra,johnbachman/indra,johnbachman/belpy,sorgerlab/belpy,sorgerlab/indra,sorgerlab/belpy,johnbachman/indra,sorgerlab/indra