removing neuronpedia api key requirements

features.py

@@ -27,11 +27,6 @@ load_dotenv(find_dotenv(), override=True)
 DESCRIPTIONS_CACHE_DIR = Path(__file__).parent / "cache"
 NEURONPEDIA_S3_BASE = "https://neuronpedia-datasets.s3.us-east-1.amazonaws.com/v1"
 NEURONPEDIA_API_BASE = "https://www.neuronpedia.org"
-NEURONPEDIA_API_KEY = os.getenv("NEURONPEDIA_API_KEY")
-if not NEURONPEDIA_API_KEY:
-    raise ValueError(
-        "NEURONPEDIA_API_KEY not found in environment variables. Please set it in your .env file."
-    )
 
 
 @dataclass