Preparations for PDF rollout

otc_metadata/data/documents/cci-api-ref.yaml

@@ -1,6 +1,6 @@
 ---
 hc_location: api/cci
-environment: public
+environment: internal
 html_location: docs/cci/api-ref
 link: /cloud-container-instance/api-ref/
 pdf_name: cci-api-ref

otc_metadata/templates/tox.ini.j2

@@ -28,7 +28,6 @@ commands = {posargs}
 [testenv:docs]
 deps =
   -r{toxinidir}/doc/requirements.txt
-  -c https://raw.githubusercontent.com/opentelekomcloud-docs/docs-constraints/main/constraints.txt
 allowlist_externals =
   mkdir
   cp