Remove obsolete docker version (#30040)

* Remove obsolete docker version from Docker files and docker composer generator

server/build/docker-compose-generator/main.go

@@ -12,7 +12,6 @@ import (
 )
 
 type DockerCompose struct {
-	Version  string                `yaml:"version"`
 	Services map[string]*Container `yaml:"services"`
 }
 
@@ -51,7 +50,6 @@ func main() {
 	}
 
 	var dockerCompose DockerCompose
-	dockerCompose.Version = "2.4"
 	dockerCompose.Services = map[string]*Container{}
 	dockerCompose.Services["start_dependencies"] = &Container{
 		Image:     "mattermost/mattermost-wait-for-dep:latest",

server/build/docker-compose.common.yml

@@ -1,4 +1,3 @@
-version: '2.4'
 services:
   mysql:
     image: "mysql/mysql-server:8.0.32"

server/build/docker-compose.yml

@@ -1,4 +1,3 @@
-version: '2.4'
 services:
   mysql:
     extends:

server/docker-compose.makefile.m1.yml

@@ -1,4 +1,3 @@
-version: '2.4'
 services:
   elasticsearch:
     image: "mattermostdevelopment/mattermost-elasticsearch:8.9.0"

server/docker-compose.makefile.yml

@@ -1,4 +1,3 @@
-version: '2.4'
 services:
   mysql:
     restart: 'no'

server/docker-compose.yaml

@@ -1,4 +1,3 @@
-version: '2.4'
 services:
   mysql:
     container_name: mattermost-mysql