feat(Docker Compose): Remove obsolete version variable

see: https://github.com/docker/compose/issues/11628

drone/server/docker-compose.cookie.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 # https://docs.drone.io/server/cookie/
 
 services:

drone/server/docker-compose.gitea.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 # https://docs.drone.io/server/provider/gitea/
 
 services:

drone/server/docker-compose.header.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 # https://docs.drone.io/server/headers/
 
 services:

drone/server/docker-compose.local.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 services:
   drone-server:
     ports:

drone/server/docker-compose.logging.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 # https://docs.drone.io/server/logging/
 
 services:

drone/server/docker-compose.postgres.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 # https://docs.drone.io/server/storage/database/
 # https://docs.drone.io/server/storage/encryption/
 

drone/server/docker-compose.traefik.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 networks:
   default:
     name: ${TRAEFIK_NETWORK_NAME}

drone/server/docker-compose.user.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 # https://docs.drone.io/server/user/registration/
 
 services:

drone/server/docker-compose.yml

@@ -1,7 +1,5 @@
 ---
 
-version: "3.8"
-
 volumes:
   drone-server:
     name: ${DRONE_SERVER_VOLUME_NAME:-drone-server}