Revert "Merge branch 'str_cat_align' of https://github.com/h-vetinari/pandas into str_cat_align"

This reverts commit cee84d0, reversing
changes made to 736fc8f.

Author: axel-d-one

pandas/core/indexes/base.py

@@ -47,6 +47,7 @@
 
 from pandas.core.base import PandasObject, IndexOpsMixin
 import pandas.core.common as com
+import pandas.core.base as base
 from pandas.core import ops
 from pandas.util._decorators import (
     Appender, Substitution, cache_readonly, deprecate_kwarg)

pandas/core/indexes/category.py

@@ -22,6 +22,7 @@
 from pandas.core.indexes.base import Index, _index_shared_docs
 from pandas.core import accessor
 import pandas.core.common as com
+import pandas.core.base as base
 import pandas.core.missing as missing
 import pandas.core.indexes.base as ibase
 

pandas/core/indexes/multi.py

@@ -23,6 +23,7 @@
 from pandas.core.dtypes.missing import isna, array_equivalent
 from pandas.errors import PerformanceWarning, UnsortedIndexError
 
+import pandas.core.base as base
 from pandas.util._decorators import Appender, cache_readonly, deprecate_kwarg
 import pandas.core.common as com
 import pandas.core.missing as missing