Revert "Add info on working with file objects"

This reverts commit 2e2d70ca9b.

docs/scenarios/json.rst

@@ -39,36 +39,6 @@ You can also convert the following to JSON:
     print(json.dumps(d))
     '{"first_name": "Guido", "last_name": "Rossum", "titles": ["BDFL", "Developer"]}'
 
-Working with File Objects
--------------------------
-
-We can also load a JSON file by using ``json.load`` instead of ``json.loads``:
-
-.. code-block:: python
-
-    import json
-    
-    with file('path/to/file.json') as f:
-        loaded_json = json.load(f)
-    
-    print(loaded_json)  # {'first_name': 'Ada', 'last_name': 'Lovelace'}
-
-Here's an example of writing directly to a file by using ``json.dump`` instead of ``json.dumps``:
-
-.. code-block:: python
-
-    import json
-
-    my_data = {
-        'name': 'Alan Turing',
-        'played_by': 'Benedict Cumberbatch'
-    }
-
-    with file('path/to/file.json', 'w') as f:
-        json.dump(my_data, f)
-
-``path/to/file.json`` now contains a JSON representation of the my_data dictionary.
-
 
 simplejson
 ----------