Remove unused require from config/schedule.rb
Remove unused require from config/schedule.rb

The SCHEDULED_PUBLISHING_PRECISION_IN_MINUTES constant is no longer
being used in the whenever definitions and the initializer now uses code
not loaded by whenever.

ggoral/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall,ggoral/whitehall,askl56/whitehall,robinwhittleton/whitehall,YOTOV-LIMITED/whitehall,hotvulcan/whitehall,alphagov/whitehall,hotvulcan/whitehall,robinwhittleton/whitehall,hotvulcan/whitehall,ggoral/whitehall,robinwhittleton/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,askl56/whitehall,YOTOV-LIMITED/whitehall,askl56/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,alphagov/whitehall,askl56/whitehall,ggoral/whitehall