fixing tests

Author: jgowdyelastic

x-pack/plugins/ml/server/routes/schemas/anomaly_detectors_schema.ts

@@ -30,6 +30,7 @@ const detectorSchema = schema.object({
   use_null: schema.maybe(schema.boolean()),
   /** Custom rules */
   custom_rules: customRulesSchema,
+  detector_index: schema.maybe(schema.number()),
 });
 
 const customUrlSchema = {

x-pack/test/functional/apps/ml/anomaly_detection/single_metric_viewer.ts

@@ -105,7 +105,6 @@ export default function ({ getService }: FtrProviderContext) {
               field_name: 'taxless_total_price',
               over_field_name: 'geoip.city_name',
               partition_field_name: 'day_of_week',
-              detector_index: 0,
             },
           ],
           influencers: ['day_of_week'],