compose: removed all versions declarations (DEPRECATED)

helper-scripts/docker-compose.override.yml.d/BUILD_FLAGS/docker-compose.override.yml

@@ -1,4 +1,3 @@
-version: '2.1'
 services:
   unbound-mailcow:
     build: ./data/Dockerfiles/unbound

helper-scripts/docker-compose.override.yml.d/EXTERNAL_DNS/docker-compose.override.yml

@@ -1,4 +1,3 @@
-version: '2.1'
 services:
 
     clamd-mailcow:

helper-scripts/docker-compose.override.yml.d/EXTERNAL_MYSQL_SOCKET/docker-compose.override.yml

@@ -1,4 +1,3 @@
-version: '2.1'
 services:
 
     php-fpm-mailcow:

helper-scripts/docker-compose.override.yml.d/HAPROXY/docker-compose.override.yml

@@ -2,7 +2,6 @@
 ## Set haproxy_trusted_networks in Dovecots extra.conf!
 ##
 
-version: '2.1'
 services:
 
     dovecot-mailcow: