srm: remove unused state

A job is never assigned the state RESTORED (perhaps as the state doesn't make
sense).  Because of this, the code that depends on a Job being in state RESTORED
is never called.

This patch removes this dead-wood

Target: master
Patch: http://rb.dcache.org/r/6650
Acked-by: Gerd Behrmann
Acked-by: Dmitry Litvintsev