vagrant: Cleanup output of VM detection logic
vagrant: Cleanup output of VM detection logic

In start.sh, we have some code to detect if there are already running
VMs and propose to the user that they stop or delete such VMs. This
commit cleans up the output of that code, by removing unnecessary
newlines and suggestions.

Signed-off-by: Paul Chaignon <a027184a55211cd23e3f3094f1fdc728df5e0500@cilium.io>

tklauser/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium