docs: remove a duplicate code block

Author: ycexiao

docs/source/examples/resample_example.rst

@@ -23,18 +23,6 @@ given enough datapoints.
 Each data table has two columns: first is the grid and second is the function value.
 To extract the columns, we can utilize the serialize function ...
 
-.. code-block:: python
-
-     from diffpy.utils.parsers.serialization import serialize_data
-     nickel_data = serialize_data('Nickel.gr', {}, nickel_datatable, dt_colnames=['grid', 'func'])
-     nickel_grid = nickel_data['Nickel.gr']['grid']
-     nickel_func = nickel_data['Nickel.gr']['func']
-     target_data = serialize_data('NiTarget.gr', {}, nitarget_datatable, dt_colnames=['grid', 'function'])
-     target_grid = nickel_data['Nickel.gr']['grid']
-     target_func = nickel_data['Nickel.gr']['func']
-
-To extract the columns, we can utilize the serialize function ...
-
 .. code-block:: python
 
      from diffpy.utils.parsers.serialization import serialize_data