HDFS-16886: Fixes error in documentation for StateStoreRecordsOperations. (#5290)

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/driver/StateStoreRecordOperations.java

@@ -56,7 +56,7 @@ public interface StateStoreRecordOperations {
    * @param clazz Class of record to fetch.
    * @param query Query to filter results.
    * @return A single record matching the query. Null if there are no matching
-   *         records or more than one matching record in the store.
+   *         records.
    * @throws IOException If multiple records match or if the data store cannot
    *           be queried.
    */