rfs_access: dontaudit unnecessary rules

avc: denied { dac_read_search } for comm="tftp_server" capability=2 scontext=u:r:rfs_access:s0 tcontext=u:r:rfs_access:s0 tclass=capability permissive=0
avc: denied { dac_override } for comm="tftp_server" capability=1 scontext=u:r:rfs_access:s0 tcontext=u:r:rfs_access:s0 tclass=capability permissive=0

Bug: 157001575
Change-Id: I3331a0af24174d496fec3660e679887f55161646