Remove binary keyword from demo notebook and docs page

docs/source/demo.rst

@@ -112,10 +112,8 @@ So in our current case, all our results are accessible by
 >>> result['kis']
 
 Again as we saw earlier, we can download these files using ``Fido.fetch()``.
-In this case, due to how the ``KISClient`` and the Data Centre are set up, it possible to download either the actual fits files containing the data, or json files containing the observation records.
-To download the data it is necessary to specify the keyword ``binary=True``.
 
->>> files = Fido.fetch(result['kis'], binary=True)
+>>> files = Fido.fetch(result['kis'])
 
 Interacting with the data
 ^^^^^^^^^^^^^^^^^^^^^^^^^

fido-demo.ipynb

@@ -341,16 +341,16 @@
     Length = 105 rows
 
 
 %% Cell type:markdown id:e1705703 tags:
 
-As we saw earlier, we can download these files using `Fido.fetch()`. In this case, due to how the `KISClient` and the Data Centre are set up, it possible to download either the actual fits files containing the data, or json files containing the observation records. To download the data it is necessary to specify the keyword `binary=True`.
+As we saw earlier, we can download these files using `Fido.fetch()`.
 
 %% Cell type:code id:9f0b89b1 tags:
 
 ``` python
-files = Fido.fetch(result, binary=True)
+files = Fido.fetch(result)
 ```
 
 %%%% Output: display_data