exo: fix affinity delete (#328)
exo: fix affinity delete (#328)

Signed-off-by: Yoan Blanc <7e8c88beed64bd6a341c3085bc82ac100e832f6e@exoscale.ch>
Reviewed-by: Vincent Bernat <1bacedde18a8590c8649f323a76223b172f24799@exoscale.ch>
Reviewed-by: mcorbin <d95f8d4054014800f6291e99f5212e126fc68f81@gmail.com>
pyr/egoscale