[Backport release_3.40] Bye cesium and google tiles "examples"

docs/user_manual/working_with_3d_tiles/3d_tiles.rst

@@ -29,43 +29,17 @@ a standardised and interoperable solution for visualising complex geographical d
    Example of 3D tiles
 
 
-Data Sources
-============
-
 Currently, QGIS supports two formats of 3D tiles:
 
 * `Cesium 3D tiles <https://cesium.com/why-cesium/3d-tiles/>`_,
   used primarily for complex 3D models of buildings or whole cities.
+  Such datasets can be provided by cloud-based platforms such as Cesium Ion
+  or Google (*Photorealistic 3D Tiles*).
 * `Quantized Mesh tiles <https://github.com/CesiumGS/quantized-mesh>`_,
   used for terrain elevation data.
 
 See :ref:`3d_tiles` for instructions on how to add these data sources to QGIS.
 
-Using data from Cesium ion 
---------------------------
-
-*Cesium ion* is a cloud-based platform for managing and streaming 3D geospatial
-data. It simplifies data management, visualisation and sharing. To add 3D tiles
-from Cesium ion, you need to first sign up to their service 
-here: https://ion.cesium.com.
-
-You can also use Cesium ion plugin from the QGIS repository 
-to add the data to QGIS.
-
-Using Google 3D data
---------------------
-
-To use Google Photorealistic 3D tiles in QGIS, get an API key for 3D tiles. 
-Once you have the key, simply add Google tiles using the same 
-connection process.
-
-.. _figure_google_3d_tiles:
-
-.. figure:: img/google_3d_tiles.png
-   :align: center
-
-   Google 3D Tiles connection 
-
 .. _3dtiles_properties:
 
 3D Tiles Properties