Don't scan files when in `autorefresh` mode
Don't scan files when in `autorefresh` mode

As the previous comment noted, this was wasted work and slowed down
server reloads when in development. The supposed benefit (that it
might uncover errors that would otherwise be hidden in development)
isn't actually that helpful.

evansd/whitenoise,evansd/whitenoise,evansd/whitenoise