Minor code cleanup for PR review

Author: quux00

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/session/EsqlSessionCCSUtils.java

@@ -300,12 +300,11 @@ static void updateExecutionInfoAtEndOfPlanning(EsqlExecutionInfo execInfo) {
  }
 
  /**
- * Checks the index expression the presence of remote clusters. If found, it will ensure that the caller
- * has installed a valid Enterprise (or Trial) license on this (coordinator) node of the querying cluster.
- * MP TODO: test this with a cluster pattern that does NOT match anything - what happens?
- * @param indices
- * @param indicesGrouper
- * @param licenseState
+ * Checks the index expression for the presence of remote clusters. If found, it will ensure that the caller
+ * has a valid Enterprise (or Trial) license on the querying cluster.
+ * @param indices index expression requested by user
+ * @param indicesGrouper grouper of index expressions by cluster alias
+ * @param licenseState license state on the querying cluster
  * @throws org.elasticsearch.ElasticsearchStatusException if the license is not valid (or present) for ES|QL CCS search.
  */
  public static void checkForCcsLicense(