Remove source variants

Author: tpoliaw

src/blueapi/config.py

@@ -48,8 +48,6 @@ def _expand_env(loader: yaml.Loader, node: yaml.ScalarNode) -> str:
 
 class SourceKind(StrEnum):
     PLAN_FUNCTIONS = "planFunctions"
-    DEVICE_FUNCTIONS = "deviceFunctions"
-    DODAL = "dodal"
     DEVICE_MANAGER = "deviceManager"