remove duplicate entries "process.out.outputCommands" in PFAOD_V5_RA1

This PR removes duplicate entries *process.out.outputCommands* in *PFAOD_V5_RA1*.

V5_RA1 is defined by extending V5 at
https://github.com/CMSAlphaT/cmg-cmssw/blob/1b1190f3a59a96314b3959885593c72bd47263a2/CMGTools/Production/python/PFAOD/PFAOD_EventContent_RA1_cff.py#L7

Therefore, it is redundant to extend process.out.outputCommands with V5 at
https://github.com/CMSAlphaT/cmg-cmssw/blob/1b1190f3a59a96314b3959885593c72bd47263a2/CMGTools/Production/PFAOD/PFAOD_V5_RA1_cfg.py#L35

This PR removed the latter extension and keeps the former.