Config file no longer necessary

Config is solely from environment variables instead.

server/app/__init__.py

@@ -13,7 +13,6 @@ Compress(app)
 CORS(app)
 
 # Config
-CONFIG_FILE = os.environ.get("CXG_CONFIG_FILE", default="scanpy-test.cfg")
 CXG_DIR = os.environ.get("CXG_DIRECTORY", default="/Users/charlotteweaver/Documents/Git/cxg-v2/data/")
 SECRET_KEY = os.environ.get("CXG_SECRET_KEY", default="SparkleAndShine")
 ENGINE = os.environ.get("CXG_ENGINE", default="scanpy")
@@ -21,11 +20,6 @@ TITLE = os.environ.get("DATASET_TITLE", default="PBMC 3K")
 # TODO remove the 2 when this is prod
 CXG_API_BASE = os.environ.get("CXG_API_BASE2", default="http://0.0.0.0:5005/api/")
 
-if not CONFIG_FILE:
-    raise ValueError("No config file set for Flask application")
-
-# TODO check what is actually being configured here
-app.config.from_pyfile(os.path.join(CXG_DIR, "config", CONFIG_FILE), silent=True)
 app.config.update(
     SECRET_KEY=SECRET_KEY,
     CXG_API_BASE=CXG_API_BASE,