Remove unnecessary override

Author: carlosdelest

server/src/main/java/org/elasticsearch/search/vectors/KnnVectorQueryBuilder.java

@@ -487,11 +487,6 @@ protected QueryBuilder doRewrite(QueryRewriteContext ctx) throws IOException {
         return this;
     }
 
-    @Override
-    protected QueryBuilder doIndexMetadataRewrite(QueryRewriteContext context) throws IOException {
-        return super.doIndexMetadataRewrite(context);
-    }
-
     @Override
     protected Query doToQuery(SearchExecutionContext context) throws IOException {
         MappedFieldType fieldType = context.getFieldType(fieldName);