Its official.
This is taken off the KLM face book page:
From March 25, 2012, KLM will discontinue its service to Liverpool. Unfortunately this route has not been profitable, and given the current economic situation we have decided to stop the operation
But its amazing what 23 hours does (exactly the same page):
currently we do not have any plans ending our service to Liverpool. You would be able to check our timetable online here:
Timetable Results - KLM.com, for more information about our flights.