Remove docker compose version indicators.

Author: plural

docker-compose.override.init.yml

@@ -1,5 +1,3 @@
-version: "3.2"
-
 services:
 
   nrdb_api_server:

docker-compose.override.yml

@@ -1,5 +1,3 @@
-version: "3.2"
-
 services:
   # service configuration for our dockerized Rails app
   nrdb_api_server:

docker-compose.yml

@@ -1,5 +1,3 @@
-version: "3.2"
-
 services:
   # service configuration for our dockerized Rails app