Remove println

Author: GalLalouche

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/LogicalPlanOptimizerTests.java

@@ -2973,7 +2973,6 @@ public void testInsist_fieldDoesNotExist_createsUnmappedFieldInRelation() {
 
         LogicalPlan plan = optimizedPlan("FROM test | INSIST_🐔 foo");
 
-        System.out.println(plan);
         var project = as(plan, Project.class);
         var limit = as(project.child(), Limit.class);
         var relation = as(limit.child(), EsRelation.class);