removed unused imports

Author: anjsudh

pandas/io/parquet.py

@@ -3,11 +3,9 @@
 from distutils.version import LooseVersion
 from warnings import catch_warnings
 
-from pandas.compat import string_types
-
-from pandas import DataFrame, Int64Index, RangeIndex, get_option
 import pandas.core.common as com
-
+from pandas import DataFrame, get_option
+from pandas.compat import string_types
 from pandas.io.common import get_filepath_or_buffer, is_s3_url