clean code

Author: you-n-g

qlib/data/data.py

@@ -308,9 +308,7 @@ def get_inst_type(cls, inst):
         raise ValueError(f"Unknown instrument type {inst}")
 
 
-class FeatureProvider(
-    abc.ABC,
-):
+class FeatureProvider(abc.ABC):
     """Feature provider class
 
     Provide feature data.