Revert "Lock file maintenance"
Revert "Lock file maintenance"

This reverts commit 7ab02638b94271923c1a89f33e823ea4c8bb7c0a.

- a sub-dependency was causing "Uncaught exception undefined" errors when post publish times were changed
- reverting until there is time to track down exactly which dependency was causing the problem

TryGhost/Ghost-Admin,TryGhost/Ghost-Admin