default void postDeleteTable(final ObserverContext<MasterCoprocessorEnvironment> ctx,
    TableName tableName) throws IOException {
  }
Called after the deleteTable operation has been requested. Called as part of delete table RPC
call.
@param ctx       the environment to interact with the framework and master
@param tableName the name of the table
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java