Delete obsolete code

The code calls into CellNucleus#sendAndWait and thus makes further
refactoring more difficult. Since the code is unused, this patch
removes it.

Target: trunk
Require-notes: no
Require-book: no
Acked-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Patch: http://rb.dcache.org/r/6747/