A few misc items for the linter

Author: benjaminarjun

pandas/core/groupby/base.py

@@ -10,6 +10,7 @@
 
 from pandas.core.dtypes.common import is_list_like, is_scalar
 
+
 class GroupByMixin(object):
     """
     Provide the groupby facilities to the mixed object.

pandas/core/groupby/groupby.py

@@ -36,7 +36,7 @@ class providing the base-class of operations.
 from pandas.core.base import (
     DataError, GroupByError, PandasObject, SelectionMixin, SpecificationError)
 import pandas.core.common as com
-from pandas.core.config import get_option, option_context
+from pandas.core.config import option_context
 from pandas.core.frame import DataFrame
 from pandas.core.generic import NDFrame
 from pandas.core.groupby import base

pandas/core/indexes/base.py

@@ -5293,8 +5293,6 @@ def _add_logical_methods_disabled(cls):
 
 class IndexGroupbyGroups(dict):
     def __repr__(self):
-        from pandas.compat import u
-
         nitems = get_option('display.max_rows') or len(self)
 
         fmt = u("{{{things}}}")