Remove unused functions and var
Remove unused functions and var

Change-Id: Ibecdc1389d97e638b93ce7d0240f52574915bf5a

neoareslinux/dragonflow,neoareslinux/dragonflow,FrankDuan/df_code,openstack/dragonflow,no2key/dragonflow,FrankDuan/df_code,FrankDuan/df_code,openstack/dragonflow,openstack/dragonflow,no2key/dragonflow