remove default values for the urls

Author: khaledk2

defaults/main.yml

@@ -39,9 +39,9 @@ force_update: false
 dump_output_format: "json"
 max_page_size: 10000
 support_async: true
-image_url: https://idr.openmicroscopy.org/webclient/img_detail/%s/
-image_webclient_url: https://idr.openmicroscopy.org/webclient/?show=image-%s
-thumb_url: https://idr.openmicroscopy.org/webclient/render_thumbnail/%s/
+image_url: ""
+image_webclient_url: ""
+thumb_url: ""
 search_container_names:
   - searchengine
   - searchengine-nginx-container