remove on-prem from docs (#564)

* remove on-prem from docs

* Update docs.yml

Author: AdiSai

fern/docs.yml

@@ -562,13 +562,9 @@ navigation:
               - page: How to Report Issues
                 path: issue-reporting.mdx
                 icon: fa-light fa-bug
-              - section: Enterprise
+              - page: Enterprise
                 path: enterprise/plans.mdx
                 icon: fa-light fa-building-shield
-                contents:
-                  - page: On-prem deployments
-                    path: enterprise/onprem.mdx
-                    icon: fa-light fa-server
               - page: Glossary
                 path: glossary.mdx
                 icon: fa-light fa-book-open