chore: remove unused tailscale setup

tailscale/.env.example

@@ -1 +0,0 @@
-TS_AUTHKEY=tskey-auth-xxxxx-CNTRL

tailscale/compose.yaml

@@ -1,21 +0,0 @@
-services:
-  tailscale:
-    image: tailscale/tailscale:latest
-    container_name: tailscale
-    network_mode: host
-    restart: unless-stopped
-    cap_add:
-      - NET_ADMIN
-      - NET_RAW
-    volumes:
-      - tailscale_data:/var/lib/tailscale
-      - /dev/net/tun:/dev/net/tun
-    environment:
-      - TS_AUTHKEY=${TS_AUTHKEY}
-      - TS_STATE_DIR=/var/lib/tailscale
-      - TS_HOSTNAME=forust-server
-      # - TS_EXTRA_ARGS=--advertise-tags=tag:container
-
-volumes:
-  tailscale_data:
-    name: tailscale_data