lxd/storage/volumes: Removes unused snapshot logic from storagePoolVolumeTypePost
lxd/storage/volumes: Removes unused snapshot logic from storagePoolVolumeTypePost

There appears to be old unused snapshot logic in storagePoolVolumeTypePost that is misleading as in fact the "storage-pools/{pool}/volumes/{type}/{name}/snapshots/{snapshotName}" route is handled by storagePoolVolumeSnapshotTypeCmd handler now.

And same for storagePoolVolumeTypeDelete.

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

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