remove obsolete docker compose version

cat5inthecradle · cat5inthecradle · commit 7fb5e05f484e · 2024-11-15T15:53:48.000-06:00
diff --git a/docker-compose.yml b/docker-compose.yml
@@ -1,4 +1,3 @@
-version: '3'
 services:
   ruby:
     build: .
