i40e: Remove useless message

Remove a useless message that blathers on whenever a vxlan port is deleted.

Change-ID: If63fb8cf38e56cf433b68e498f11389de51919ba
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>