Revert "Ignore exit code of checking pylint version in case it fails on Python nightly on Travis."
Revert "Ignore exit code of checking pylint version in case it fails on Python nightly on Travis."

This reverts commit e639e7e700e259dafd0cfc0d99b1a0108ca1fbf4.

MozillaSecurity/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz