Remove unnecessary influxdb instance

Never used it anyway

ansible/roles/forrest/files/influxdb/docker-compose.yml

@@ -1,29 +0,0 @@
-version: "2.3"
-
-services:
-  influxdb:
-    image: influxdb:1.8-alpine
-    restart: unless-stopped
-    volumes:
-      - /mnt/tank/dbs/influx/forrest:/var/lib/influxdb
-    environment:
-      - INFLUXDB_HTTP_AUTH_ENABLED=true
-    networks:
-      - default
-      - grafana
-
-  chronograf:
-    image: chronograf:1.8-alpine
-    restart: unless-stopped
-    environment:
-      - INFLUXDB_URL=http://influxdb:8086
-      - INFLUXDB_USERNAME=influxadmin
-      - INFLUXDB_PASSWORD={{ influxdb_admin_password }}
-    volumes:
-      - ./chronograf:/var/lib/chronograf
-    ports:
-      - "{{ pve_hosts.forrest.ip }}:8888:8888"
-
-networks:
-  grafana:
-    external: true