remove inconsistent validator

Author: cpcloud

pandas/core/config_init.py

@@ -151,8 +151,7 @@
     cf.register_option('precision', 7, pc_precision_doc, validator=is_int)
     cf.register_option('float_format', None, float_format_doc)
     cf.register_option('column_space', 12, validator=is_int)
-    cf.register_option('max_info_rows', 1000000, pc_max_info_rows_doc,
-                       validator=lambda x: is_int(x) or x is None)
+    cf.register_option('max_info_rows', 1000000, pc_max_info_rows_doc)
     cf.register_option('max_rows', 100, pc_max_rows_doc, validator=is_int)
     cf.register_option('max_colwidth', 50, max_colwidth_doc, validator=is_int)
     cf.register_option('max_columns', 20, pc_max_cols_doc, validator=is_int)