shared/api: Drop StoragePool from Resources struct
shared/api: Drop StoragePool from Resources struct

The ResourcesStoragePool struct is only meant to be used on its own, no
value are meant to be exposed for it through /1.0/resources.

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

atxwebs/lxd,hallyn/lxd,hallyn/lxd,Skarlso/lxd,mjeanson/lxd,lxc/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,atxwebs/lxd,lxc/lxd,atxwebs/lxd,hallyn/lxd,Skarlso/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,mjeanson/lxd,hallyn/lxd,mjeanson/lxd,lxc/lxd,lxc/lxd,Skarlso/lxd,stgraber/lxd,atxwebs/lxd,Skarlso/lxd,stgraber/lxd,hallyn/lxd,lxc/lxd