diff --git a/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregationBuilder.java b/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregationBuilder.java
index ea246feda4d..2d6398ee31e 100644
--- a/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregationBuilder.java
+++ b/core/src/main/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregationBuilder.java
@@ -37,10 +37,8 @@ import org.elasticsearch.search.aggregations.AggregatorFactory;
 import org.elasticsearch.search.internal.SearchContext;
 
 import java.io.IOException;
-import java.util.HashSet;
 import java.util.Map;
 import java.util.Objects;
-import java.util.Set;
 import java.util.function.Function;
 
 public class ScriptedMetricAggregationBuilder extends AbstractAggregationBuilder<ScriptedMetricAggregationBuilder> {
@@ -239,11 +237,6 @@ public class ScriptedMetricAggregationBuilder extends AbstractAggregationBuilder
         Map<String, Object> params = null;
         XContentParser.Token token;
         String currentFieldName = null;
-        Set<String> scriptParameters = new HashSet<>();
-        scriptParameters.add(INIT_SCRIPT_FIELD.getPreferredName());
-        scriptParameters.add(MAP_SCRIPT_FIELD.getPreferredName());
-        scriptParameters.add(COMBINE_SCRIPT_FIELD.getPreferredName());
-        scriptParameters.add(REDUCE_SCRIPT_FIELD.getPreferredName());
 
         XContentParser parser = context.parser();
         while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {