Replace hard-coded "rm -f /tmp/bench.root" by the correct
 (platform-independent) way to do this:
gSystem->Unlink(Form("%s/bench.root",gSystem->TempDirectory()));


git-svn-id: http://root.cern.ch/svn/root/trunk@21912 27541ba8-7e3a-0410-8455-c3a389f83636