After removing a node from a cluster, you do not need to perform any steps to update the SFDB repository.
For information on updating the SFDB repository after adding a node to the cluster:
See Updating the Storage Foundation for Databases (SFDB) repository after adding a node.
For information on removing the SFDB repository after removing the product:
See Removing the Storage Foundation for Databases (SFDB) repository after removing the product.