nova: Stop setting '[DEFAULT] use_ipv6'

Change I188fc2cd1b26fe7a71804f7e7d66b111d6f15e30 in nova stopped us
respecting this when generating the network templates injected into
instances on boot. With the removal of nova-network, there is no longer
any other reason to set this.

Change-Id: I925b7c6c23133cd5a835960f4507c979f615d78e
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>
1 file changed