Remove unused settings.

conf.yml-example

@@ -1,10 +1,6 @@
 api_key: "FIXME"
 
-flask_settings_dev:
-  DEBUG: True
-
-flask_settings_prod:
-  DEBUG: False
+debug: False
 
 targets:
   - target_awake_temperature

thermostat.py

@@ -44,17 +44,12 @@ authorizations = {
 
 with open('./conf.yml') as conf:
     yaml_conf = yaml.safe_load(conf)
-    flask_settings = yaml_conf.get("flask_settings")
+    debug = yaml_conf.get("debug")
     api_key = yaml_conf.get("api_key")
-    if os.environ['FLASK_ENV'] == 'development':
-        flask_settings_env = yaml_conf.get("flask_settings_dev")
+    if debug:
       logging.getLogger().setLevel(logging.DEBUG)
-    elif os.environ['FLASK_ENV'] == 'production':
-        flask_settings_env = yaml_conf.get("flask_settings_prod")
-        logging.getLogger().setLevel(logging.INFO)
     else:
-        logging.error("FLASK_ENV must be set to development or production.")
-        sys.exit(1)
+      logging.getLogger().setLevel(logging.INFO)
     targets = yaml_conf.get("targets")
     modes = yaml_conf.get("modes")
     http_port = yaml_conf.get("http_port")
@@ -175,8 +170,6 @@ signal.signal(signal.SIGTERM,handler)
 signal.signal(signal.SIGINT,handler)
 
 app = Flask(__name__)
-app.config.from_mapping(flask_settings)
-app.config.from_mapping(flask_settings_env)
 api = Api(app, version='1.0', title='Thermostat and load shedder',
     description='API to read and set thermostat.', authorizations=authorizations)
 ns_thermostat = api.namespace('thermostat/', description='Thermostat API')