message: removed duplicate link
  fixes
diff: - [Cluster configuration](./cluster-configuration.md).
  - [CDRS session](./cdrs-session.md):
  -- [SSL session](./cdrs-session.md)
  - [Making queries](./making-query.md).
  - [Query values](./query-values.md)
  - [Cassandra-to-Rust deserialization](./deserialization.md).
  