chore: remove docker-compose-for-compiler-developers

Author: yutaro-sakamoto

.github/workflows/docker-compose-for-compiler-developers.yml

@@ -32,16 +32,4 @@ cd /root/ocesql4j_sample
 make
 ```
 
-## Docker containers for compiler developers
-
-In order to launch the development environment with a database server and a client with opensource COBOL 4J Open COBOL ESQL 4J installed, run the following command.
-
-```bash
-cd docker-compose-compose-for-compiler-developers
-docker compose up -d
-docker attach oc4j_client
-```
-
-The container is for developers opensource COBOL 4J and Open COBOL ESQL 4J, not users of them.
-
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