diff --git a/pandas/core/base.py b/pandas/core/base.py
index 148be3f50c0e7..2d8a41f770bc2 100644
--- a/pandas/core/base.py
+++ b/pandas/core/base.py
@@ -123,15 +123,11 @@ def __setattr__(self, key: str, value):
         object.__setattr__(self, key, value)
 
 
-class GroupByError(Exception):
+class DataError(Exception):
     pass
 
 
-class DataError(GroupByError):
-    pass
-
-
-class SpecificationError(GroupByError):
+class SpecificationError(Exception):
     pass
 
 
@@ -372,7 +368,7 @@ def _agg_1dim(name, how, subset=None):
                     )
                 return colg.aggregate(how)
 
-            def _agg_2dim(name, how):
+            def _agg_2dim(how):
                 """
                 aggregate a 2-dim with how
                 """