lxd/containers: Skip interface removal if missing
lxd/containers: Skip interface removal if missing

Signed-off-by: s3rj1k <97d0a85a4a5f9b3fd6f9f07441abe8690e693861@gmail.com>

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