Small clean-up

Author: topper-123

pandas/core/arrays/string_.py

@@ -166,6 +166,7 @@ class StringArray(PandasArray):
 
     On the other hand, instantiating StringArrays directly with non-strings will
     raise an error:
+
     >>> pd.arrays.StringArray(np.array([1, 2]))
     ValueError: StringArray requires a sequence of strings or pandas.NA
 

pandas/tests/extension/decimal/array.py

@@ -131,8 +131,6 @@ def copy(self):
         return type(self)(self._data.copy())
 
     def astype(self, dtype, copy=True):
-        from pandas.core.arrays.string_ import StringDtype
-
         dtype = pandas_dtype(dtype)
         if isinstance(dtype, type(self.dtype)):
             return type(self)(self._data, context=dtype.context)