temporary remove aggregation example (#382)

docs/examples/index.rst

@@ -12,6 +12,6 @@ Offline example access
 Below you can access some of the main examples and go through them in an off-line manner. More examples will be added soon.
 
 1. `Creating a Delft-FIAT model anywhere in the world from OSM and JRC data <../_examples/global_OSM_JRC.ipynb>`_
-2. `Adding aggregation zones to your Delft-FIAT model <../_examples/aggregation_zones_example.ipynb>`_
+.. 2. `Adding aggregation zones to your Delft-FIAT model <../_examples/aggregation_zones_example.ipynb>`_
 3. `Updating your Delft-FIAT model with local data <../_examples/update_exposure_data.ipynb>`_
 4. `Creating a Delft-FIAT model to assess road damage with OSM roads <../_examples/add_roadnetwork.ipynb>`_