Revert "Mention 1password support"

This reverts commit ef1ea56.

Author: rdimitrov

docs/toolhive/concepts/backend-auth.mdx

@@ -73,8 +73,7 @@ auditability. Static credentials are long-lived and shared across all users, so
 there is no per-user attribution in audit logs.
 
 When using static credentials, consider integrating with a secret management
-system like [HashiCorp Vault](../integrations/vault.mdx) or
-[1Password](../guides-cli/secrets-management.mdx) for secure storage and
+system like [HashiCorp Vault](../integrations/vault.mdx) for secure storage and
 rotation.
 
 ### Token exchange