diff --git a/src/plugins/data/common/search/aggs/buckets/filters.ts b/src/plugins/data/common/search/aggs/buckets/filters.ts
index 4861c7248ebff..2ce6abbef543e 100644
--- a/src/plugins/data/common/search/aggs/buckets/filters.ts
+++ b/src/plugins/data/common/search/aggs/buckets/filters.ts
@@ -12,7 +12,6 @@ import { buildEsQuery, Query } from '@kbn/es-query';
 
 import { QueryFilter, queryFilterToAst } from '../../expressions';
 import { createFilterFilters } from './create_filter/filters';
-import { toAngularJSON } from '../utils';
 import { BucketAggType } from './bucket_agg_type';
 import { BUCKET_TYPES } from './bucket_agg_types';
 import { aggFiltersFnName } from './filters_fn';
@@ -83,7 +82,7 @@ export const getFiltersBucketAgg = ({ getConfig }: FiltersBucketAggDependencies)
                 matchAllLabel ||
                 (typeof filter.input.query === 'string'
                   ? filter.input.query
-                  : toAngularJSON(filter.input.query));
+                  : JSON.stringify(filter.input.query));
               filters[label] = query;
             },
             {}
diff --git a/src/plugins/data/common/search/aggs/utils/index.ts b/src/plugins/data/common/search/aggs/utils/index.ts
index 2edce79ca690b..d12c0ebb1cbbd 100644
--- a/src/plugins/data/common/search/aggs/utils/index.ts
+++ b/src/plugins/data/common/search/aggs/utils/index.ts
@@ -13,6 +13,5 @@ export * from './date_interval_utils';
 export * from './get_aggs_formats';
 export * from './ip_address';
 export * from './prop_filter';
-export * from './to_angular_json';
 export * from './infer_time_zone';
 export * from './parse_time_shift';
diff --git a/src/plugins/data/common/search/aggs/utils/to_angular_json.ts b/src/plugins/data/common/search/aggs/utils/to_angular_json.ts
deleted file mode 100644
index cf4050072b829..0000000000000
--- a/src/plugins/data/common/search/aggs/utils/to_angular_json.ts
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License
- * 2.0 and the Server Side Public License, v 1; you may not use this file except
- * in compliance with, at your election, the Elastic License 2.0 or the Server
- * Side Public License, v 1.
- */
-
-/**
- * An inlined version of angular.toJSON(). Source:
- * https://github.com/angular/angular.js/blob/master/src/Angular.js#L1312
- *
- * @internal
- */
-export function toAngularJSON(obj: any, pretty?: any): string {
-  if (obj === undefined) return '';
-  if (typeof pretty === 'number') {
-    pretty = pretty ? 2 : null;
-  }
-  return JSON.stringify(obj, toJsonReplacer, pretty);
-}
-
-function isWindow(obj: any) {
-  return obj && obj.window === obj;
-}
-
-function isScope(obj: any) {
-  return obj && obj.$evalAsync && obj.$watch;
-}
-
-function toJsonReplacer(key: any, value: any) {
-  let val = value;
-
-  if (typeof key === 'string' && key.charAt(0) === '$' && key.charAt(1) === '$') {
-    val = undefined;
-  } else if (isWindow(value)) {
-    val = '$WINDOW';
-  } else if (value && window.document === value) {
-    val = '$DOCUMENT';
-  } else if (isScope(value)) {
-    val = '$SCOPE';
-  }
-
-  return val;
-}