STYLE: remove use in pd.api.dtype in decimal/array.py (pandas-dev#39203)

Author: nofarmish

pandas/tests/extension/decimal/array.py

@@ -14,6 +14,7 @@
 from pandas.core.arraylike import OpsMixin
 from pandas.core.arrays import ExtensionArray, ExtensionScalarOpsMixin
 from pandas.core.indexers import check_array_indexer
+from pandas.api.types import is_scalar
 
 
 @register_extension_dtype
@@ -142,8 +143,8 @@ def astype(self, dtype, copy=True):
         return super().astype(dtype, copy=copy)
 
     def __setitem__(self, key, value):
-        if pd.api.types.is_list_like(value):
-            if pd.api.types.is_scalar(key):
+        if is_list_like(value):
+            if is_scalar(key):
                 raise ValueError("setting an array element with a sequence.")
             value = [decimal.Decimal(v) for v in value]
         else: