Remove some dead code.

src/main/java/org/elasticsearch/search/aggregations/metrics/NumericValuesSourceMetricsAggregatorParser.java

@@ -46,10 +46,6 @@ public abstract class NumericValuesSourceMetricsAggregatorParser<S extends Inter
         return aggType.name();
     }
 
-    protected boolean requiresSortedValues() {
-        return false;
-    }
-
     @Override
     public AggregatorFactory parse(String aggregationName, XContentParser parser, SearchContext context) throws IOException {
 

src/main/java/org/elasticsearch/search/aggregations/metrics/min/MinParser.java

@@ -32,11 +32,6 @@ public class MinParser extends NumericValuesSourceMetricsAggregatorParser<Intern
         super(InternalMin.TYPE);
     }
 
-    @Override
-    protected boolean requiresSortedValues() {
-        return true;
-    }
-
     @Override
     protected AggregatorFactory createFactory(String aggregationName, ValuesSourceConfig<ValuesSource.Numeric> config) {
         return new MinAggregator.Factory(aggregationName, config);

src/main/java/org/elasticsearch/search/aggregations/support/ValuesSourceParser.java

@@ -79,8 +79,6 @@ public class ValuesSourceParser<VS extends ValuesSource> {
     private boolean scriptable = true;
     private boolean formattable = false;
     private ValueType targetValueType = null;
-    private boolean requiresSortedValues = false;
-    private boolean requiresUniqueValues = false;
     private ScriptParameterParser scriptParameterParser = new ScriptParameterParser();
 
     private Input input = new Input();