Remove walker for now

Tried to use alpine, Nebula doesn't like it. Will use Debian, and recreate the machine when I have more time

terraform/walker_vps.tf

@@ -1,17 +0,0 @@
-module "walker_firewall" {
-  source = "./vultr_firewall/"
-
-  description = "walker"
-  ports = toset([
-    "80/tcp",
-    "443/tcp",
-  ])
-}
-
-
-resource "vultr_instance" "walker" {
-  plan              = "vhf-1c-1gb"
-  region            = "lhr"
-  hostname          = "walker"
-  firewall_group_id = module.walker_firewall.firewall_group.id
-}