CLN: fix import preventing asv from running for old commits

Author: qwhelan

asv_bench/benchmarks/pandas_vb_common.py

@@ -16,14 +16,17 @@
                   np.float64, np.int16, np.int8, np.uint16, np.uint8]
 datetime_dtypes = [np.datetime64, np.timedelta64]
 string_dtypes = [np.object]
-extension_dtypes = [pd.Int8Dtype, pd.Int16Dtype,
-                    pd.Int32Dtype, pd.Int64Dtype,
-                    pd.UInt8Dtype, pd.UInt16Dtype,
-                    pd.UInt32Dtype, pd.UInt64Dtype,
-                    pd.CategoricalDtype,
-                    pd.IntervalDtype,
-                    pd.DatetimeTZDtype('ns', 'UTC'),
-                    pd.PeriodDtype('D')]
+try:
+    extension_dtypes = [pd.Int8Dtype, pd.Int16Dtype,
+                        pd.Int32Dtype, pd.Int64Dtype,
+                        pd.UInt8Dtype, pd.UInt16Dtype,
+                        pd.UInt32Dtype, pd.UInt64Dtype,
+                        pd.CategoricalDtype,
+                        pd.IntervalDtype,
+                        pd.DatetimeTZDtype('ns', 'UTC'),
+                        pd.PeriodDtype('D')]
+except AttributeError:
+    extension_dtypes = []
 
 
 def setup(*args, **kwargs):