chore: remove temporary key helper

compose.yaml

@@ -19,15 +19,3 @@ services:
       timeout: 5s
       start_period: 15s
       retries: 3
-
-  beszel-key-helper:
-    image: alpine:3.22
-    container_name: beszel-key-helper
-    restart: "no"
-    volumes:
-      - /app-config/beszel/hub:/hub:ro
-      - /app-config/beszel/key-helper:/out
-    command: >-
-      sh -c "apk add --no-cache openssh-client >/dev/null &&
-      ssh-keygen -y -f /hub/id_ed25519 > /out/id_ed25519.pub &&
-      sleep 600"