remove DIS documentation from portal

Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Michal Kacur <michal.kacur@t-systems.com>
Co-committed-by: Michal Kacur <michal.kacur@t-systems.com>

otc_metadata/data/services/dis.yaml

@@ -1,12 +0,0 @@
----
-service_category: big_data
-service_title: Data Ingestion Service
-service_type: dis
-service_uri: data-ingestion-service
-teams:
-  - name: docs-bigdata-ai-rw
-    permission: write
-cloud_environments:
-  - name: eu_de
-    visibility: public
-is_global: false