revert docs update

Signed-off-by: Ben Ye <[email protected]>

Author: yeya24

docs/api/_index.md

@@ -39,7 +39,6 @@ For the sake of clarity, in this document we have grouped API endpoints by servi
 | [Get label values](#get-label-values)                                                 | Querier, Query-frontend | `GET <prometheus-http-prefix>/api/v1/label/{name}/values`  |
 | [Get metric metadata](#get-metric-metadata)                                           | Querier, Query-frontend | `GET <prometheus-http-prefix>/api/v1/metadata`             |
 | [Remote read](#remote-read)                                                           | Querier, Query-frontend | `POST <prometheus-http-prefix>/api/v1/read`                |
-| [Build information](#build-information)                                               | Querier, Query-frontend | `POST <prometheus-http-prefix>/api/v1/status/buildinfo`    |
 | [Get tenant ingestion stats](#get-tenant-ingestion-stats)                             | Querier | `GET /api/v1/user_stats`                                   |
 | [Ruler ring status](#ruler-ring-status)                                               | Ruler | `GET /ruler/ring`                                          |
 | [Ruler rules ](#ruler-rule-groups)                                                    | Ruler | `GET /ruler/rule_groups`                                   |
@@ -408,19 +407,6 @@ _For more information, please check out Prometheus [Remote storage integrations]
 
 _Requires [authentication](#authentication)._
 
-### Build Information
-
-```
-POST <prometheus-http-prefix>/api/v1/status/buildinfo
-
-# Legacy
-POST <legacy-http-prefix>/api/v1/status/buildinfo
-```
-
-Prometheus-compatible [build information](https://prometheus.io/docs/prometheus/latest/querying/api/#build-information) endpoint.
-
-_Requires [authentication](#authentication)._
-
 ## Querier
 
 ### Get tenant ingestion stats