remove old stuff from makefile

makefile

@@ -79,11 +79,6 @@ clean:
 	python -Bc "import pathlib; [p.rmdir() for p in pathlib.Path('.').rglob('__pycache__')]"
 
 
-.PHONY: test_with_branch
-test_with_branch:
-	@echo "creating test environment"
-	cp pyproject.toml poetry.lock maze-dataset_test
-
 
 # listing targets, from stackoverflow
 # https://stackoverflow.com/questions/4219255/how-do-you-get-the-list-of-targets-in-a-makefile