remove Architecture Center from metadata

Reviewed-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-authored-by: tischrei <tino.schreiber@t-systems.com>
Co-committed-by: tischrei <tino.schreiber@t-systems.com>

otc_metadata/data/documents/ac-blueprints.yaml

@@ -1,9 +0,0 @@
----
-environment: public
-link: /architecture-center/blueprints/
-pdf_name: architecture-center-blueprints
-rst_location: doc/blueprints/source
-service_type: ac
-title: Blueprints
-type: blueprints
-disable_import: true

otc_metadata/data/documents/ac-cloud-adoption-framework.yaml

@@ -1,9 +0,0 @@
----
-environment: internal
-link: /architecture-center/caf/
-pdf_name: architecture-center-cloud-adoption-framework
-rst_location: doc/caf/source
-service_type: ac
-title: Cloud Adoption Framework
-type: caf
-disable_import: true