Revert "[0.49] vector manager active tidb discovery (#76)" (#91)

This reverts commit 62fed41.

Author: zeminzhou

src/common/keyspace_cluster.rs

@@ -2,5 +2,4 @@ pub mod checkpointer;
 pub mod deltalake_s3;
 pub mod deltalake_writer;
 pub mod features;
-pub mod keyspace_cluster;
 pub mod topology;