Delete business dashboard

Reviewed-by: Tino Schreiber <tino.schreiber@t-systems.com>
Co-authored-by: Sebastian Gode <sebastian.gode@telekom.de>
Co-committed-by: Sebastian Gode <sebastian.gode@telekom.de>

otc_metadata/data/documents/bd-umn.yaml

@@ -1,8 +0,0 @@
----
-link: /business-dashboard/umn/
-rst_location: umn/source
-pdf_enabled: false
-pdf_environment: hidden
-service_type: bd
-title: User Guide
-type: umn

otc_metadata/data/services/bd.yaml

@@ -1,13 +0,0 @@
----
-environment: internal
-repositories:
-- environment: internal
-  repo: docs/business-dashboard
-  type: gitea
-service_category: other
-service_title: Business Dashboard
-service_type: bd
-service_uri: business-dashboard
-teams:
-- name: docs-dashboard-rw
-  permission: write