cleanup

Author: fang-xing-esql

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/analysis/PreAnalyzer.java

@@ -131,7 +131,5 @@ private void collectSubqueryIndexPattern(
             return;
         }
         subqueryIndices.add(pattern);
-        System.out.println("collected subquery index pattern: " + pattern);
-        System.out.println("subquery indices now: " + subqueryIndices);
     }
 }