Remove Reqres, is a duplicate API

The API added in #1804 is duplicated. This API already exists in the Development section.

Ref: https://github.com/public-apis/public-apis/runs/3330644027?check_suite_focus=true#step:3:7

README.md

@@ -1020,7 +1020,6 @@ API | Description | Auth | HTTPS | CORS |
 | [QuickMocker](https://quickmocker.com) | API mocking tool to generate contextual, fake or random data | No | Yes | Yes |
 | [Randommer](https://randommer.io/randommer-api) | Random data generator | `apiKey` | Yes | Yes |
 | [RandomUser](https://randomuser.me) | Generates and list user data | No | Yes | Unknown |
-| [Reqres](https://reqres.in) | Generates random user data | No | Yes | Unknown |
 | [RoboHash](https://robohash.org/) | Generate random robot/alien avatars | No | Yes | Unknown |
 | [Spanish random words](https://palabras-aleatorias-public-api.herokuapp.com) | Generate spanish words randomly | No | Yes | Unknown |
 | [This Person Does not Exist](https://thispersondoesnotexist.com) | Generates real-life faces of people who do not exist | No | Yes | Unknown |