[INTERNAL] removed useVersionControl variable from FileList

VCSProviderId != null <=> useVersionControl = true

Change-Id: Ie078064fb8070661f7215df263734ce30c17f18f
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1724
Tested-by: Jenkins-Core QA
Tested-by: Jenkins-Eclipse QA
Tested-by: Jenkins CI
Reviewed-by: Stefan Rossbach <srossbach@arcor.de>