COMPMID-1398: Removed --threads from CommonOptions

Otherwise --threads appear twice for benchmark_graph_* tests

Change-Id: I4f5454f6a2fda2558386290583a0ab84cd4666bb
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/139827
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
5 files changed