Remove Bing integration (#2195)

Author: mattiagiupponi

geonode_mapstore_client/templates/geonode-mapstore-client/_geonode_config.html

@@ -177,7 +177,6 @@
                 ],
                 extensionsFolder: extensionsFolder,
                 printUrl: geoServerPublicLocation + 'pdf/info.json',
-                bingApiKey: '{% bing_api_key %}',
                 mapboxAccessToken: '{{ MAPBOX_ACCESS_TOKEN }}',
                 geoNodeApi: {
                     endpointV1: siteUrl + 'api',