remove inheritance from 'object'

Author: topper-123

doc/source/whatsnew/v0.25.0.rst

@@ -78,7 +78,7 @@ The repr now looks like this:
 
 Previously, outputting a :class:`MultiIndex` printed all the ``levels`` and
 ``codes`` of the ``MultiIndex``, which was visually unappealing and made
-the output more difficult to navigate:
+the output more difficult to navigate. For example (limiting the range to 5):
 
 .. code-block:: ipython
 

pandas/tests/indexes/multi/test_format.py

@@ -76,7 +76,7 @@ def test_repr_max_seq_item_setting(idx):
         assert '...' not in str(idx)
 
 
-class TestRepr(object):
+class TestRepr:
 
     def test_repr(self, idx):
         result = idx[:1].__repr__()