✅ remove unused function in unit test

tests/test_create_template.py

@@ -1,17 +1,7 @@
-import os
 import re
 import subprocess  # nosec
 
 
-def build_files_list(root_dir):  # type: ignore
-    """Build a list containing absolute paths to the generated files."""
-    return [
-        os.path.join(dirpath, file_path)
-        for dirpath, _, files in os.walk(root_dir)
-        for file_path in files
-    ]
-
-
 def test_run_cookiecutter_result(cookies):  # type: ignore
     """Runs cookiecutter and checks a couple of things"""
     project_name = "data science project template"