chore: remove unused codes for samples (#20272)

UPDATING.md

@@ -27,6 +27,7 @@ assists people when migrating to a new version.
 - [19046](https://github.com/apache/superset/pull/19046): Enables the drag and drop interface in Explore control panel by default. Flips `ENABLE_EXPLORE_DRAG_AND_DROP` and `ENABLE_DND_WITH_CLICK_UX` feature flags to `True`.
 - [18936](https://github.com/apache/superset/pull/18936): Removes legacy SIP-15 interim logic/flags—specifically the `SIP_15_ENABLED`, `SIP_15_GRACE_PERIOD_END`, `SIP_15_DEFAULT_TIME_RANGE_ENDPOINTS`, and `SIP_15_TOAST_MESSAGE` flags. Time range endpoints are no longer configurable and strictly adhere to the `[start, end)` paradigm, i.e., inclusive of the start and exclusive of the end. Additionally this change removes the now obsolete `time_range_endpoints` from the form-data and resulting in the cache being busted.
 - [19570](https://github.com/apache/superset/pull/19570): makes [sqloxide](https://pypi.org/project/sqloxide/) optional so the SIP-68 migration can be run on aarch64. If the migration is taking too long installing sqloxide manually should improve the performance.
+- [20170](https://github.com/apache/superset/pull/20170): Introduced a new endpoint for getting datasets samples.
 
 ### Breaking Changes
 

superset-frontend/src/explore/exploreUtils/index.js

@@ -26,7 +26,6 @@ import {
   getChartBuildQueryRegistry,
   getChartMetadataRegistry,
 } from '@superset-ui/core';
-import { omit } from 'lodash';
 import { availableDomains } from 'src/utils/hostNamesConfig';
 import { safeStringify } from 'src/utils/safeStringify';
 import { URL_PARAMS } from 'src/constants';
@@ -216,7 +215,7 @@ export const buildV1ChartDataPayload = ({
           ...baseQueryObject,
         },
       ]));
-  const payload = buildQuery(
+  return buildQuery(
     {
       ...formData,
       force,
@@ -230,13 +229,6 @@ export const buildV1ChartDataPayload = ({
       },
     },
   );
-  if (resultType === 'samples') {
-    // remove row limit and offset to fall back to defaults
-    payload.queries = payload.queries.map(query =>
-      omit(query, ['row_limit', 'row_offset']),
-    );
-  }
-  return payload;
 };
 
 export const getLegacyEndpointType = ({ resultType, resultFormat }) =>