docs: drop obsolete docker compose version (#6806)

docker/compose/docker-compose.ci-test.yml

@@ -3,7 +3,6 @@
 # Can be used locally or by the CI to start the necessary containers with the
 # correct networking for the tests
 
-version: "3.7"
 services:
   gotenberg:
     image: docker.io/gotenberg/gotenberg:7.10

docker/compose/docker-compose.mariadb-tika.yml

@@ -30,7 +30,6 @@
 # For more extensive installation and update instructions, refer to the
 # documentation.
 
-version: "3.4"
 services:
   broker:
     image: docker.io/library/redis:7

docker/compose/docker-compose.mariadb.yml

@@ -26,7 +26,6 @@
 # For more extensive installation and update instructions, refer to the
 # documentation.
 
-version: "3.4"
 services:
   broker:
     image: docker.io/library/redis:7

docker/compose/docker-compose.portainer.yml

@@ -28,7 +28,6 @@
 # For more extensive installation and update instructions, refer to the
 # documentation.
 
-version: "3.4"
 services:
   broker:
     image: docker.io/library/redis:7

docker/compose/docker-compose.postgres-tika.yml

@@ -30,7 +30,6 @@
 # For more extensive installation and update instructions, refer to the
 # documentation.
 
-version: "3.4"
 services:
   broker:
     image: docker.io/library/redis:7

docker/compose/docker-compose.postgres.yml

@@ -26,7 +26,6 @@
 # For more extensive installation and update instructions, refer to the
 # documentation.
 
-version: "3.4"
 services:
   broker:
     image: docker.io/library/redis:7

docker/compose/docker-compose.sqlite-tika.yml

@@ -30,7 +30,6 @@
 # For more extensive installation and update instructions, refer to the
 # documentation.
 
-version: "3.4"
 services:
   broker:
     image: docker.io/library/redis:7

docker/compose/docker-compose.sqlite.yml

@@ -23,7 +23,6 @@
 # For more extensive installation and update instructions, refer to the
 # documentation.
 
-version: "3.4"
 services:
   broker:
     image: docker.io/library/redis:7