Remove unused function in docker api test.

Author: tillahoffmann

core/tests/test_new_docker_api.py

@@ -1,14 +1,8 @@
-import os
 from pathlib import Path
 
 from testcontainers.core.container import DockerContainer
 
 
-def setup_module(m):
-    os.environ["MYSQL_USER"] = "demo"
-    os.environ["MYSQL_DATABASE"] = "custom_db"
-
-
 def test_docker_custom_image():
     container = DockerContainer("mysql:5.7.17")
     container.with_exposed_ports(3306)