Remove BetterMeta (#1860)

This API is inactive.

resolve #1860

README.md

@@ -288,7 +288,6 @@ API | Description | Auth | HTTPS | CORS |
 | [ApicAgent](https://www.apicagent.com) | Extract device details from user-agent string | No | Yes | Yes |
 | [ApiFlash](https://apiflash.com/) | Chrome based screenshot API for developers | `apiKey` | Yes | Unknown |
 | [APIs.guru](https://apis.guru/api-doc/) | Wikipedia for Web APIs, OpenAPI/Swagger specs for public APIs | No | Yes | Unknown |
-| [BetterMeta](http://bettermeta.io) | Return a site's meta tags in JSON format | `X-Mashape-Key` | Yes | Unknown |
 | [Bitbucket](https://developer.atlassian.com/bitbucket/api/2/reference/) | Bitbucket API | `OAuth` | Yes | Unknown |
 | [Blitapp](https://blitapp.com/api/) | Schedule screenshots of web pages and sync them to your cloud | `apiKey` | Yes | Unknown |
 | [Bored](https://www.boredapi.com/) | Find random activities to fight boredom | No | Yes | Unknown |