(HTCONDOR-454)  Remove wrong and confusing stray line from condor_gpu_discovery -help output.
(HTCONDOR-454)  Remove wrong and confusing stray line from condor_gpu_discovery -help output.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor