Remove chainmap_impl compat code (pandas-dev#25840)

jbrockmendel · jreback · commit 2b67692bee7a · 2019-03-23T16:08:42.000-04:00
diff --git a/pandas/compat/chainmap.py b/pandas/compat/chainmap.py
@@ -1,7 +1,4 @@
-try:
-    from collections import ChainMap
-except ImportError:
-    from pandas.compat.chainmap_impl import ChainMap
+from collections import ChainMap
 
 
 class DeepChainMap(ChainMap):
diff --git a/pandas/compat/chainmap_impl.py b/pandas/compat/chainmap_impl.py
diff --git a/pandas/compat/numpy/function.py b/pandas/compat/numpy/function.py
@@ -21,12 +21,11 @@
 
 from numpy import ndarray
 
+from pandas._libs.lib import is_bool, is_integer
 from pandas.errors import UnsupportedFunctionCall
 from pandas.util._validators import (
     validate_args, validate_args_and_kwargs, validate_kwargs)
 
-from pandas.core.dtypes.common import is_bool, is_integer
-
 
 class CompatValidator(object):
 
