Remove Indian Railways API (#1381)

Which doesn't work anymore

README.md

@@ -822,7 +822,6 @@ API | Description | Auth | HTTPS | CORS |
 | [Goibibo](https://developer.goibibo.com/docs) | API for travel search | `apiKey` | Yes | Unknown |
 | [GraphHopper](https://graphhopper.com/api/1/docs/) | A-to-B routing with turn-by-turn instructions | `apiKey` | Yes | Unknown |
 | [Icelandic APIs](http://docs.apis.is/) | Open APIs that deliver services in or regarding Iceland | No | Yes | Unknown |
-| [Indian Railways](http://api.erail.in/) | Indian Railways Information | `apiKey` | No | Unknown |
 | [Izi](http://api-docs.izi.travel/) | Audio guide for travellers | `apiKey` | Yes | Unknown |
 | [Metro Lisboa](http://app.metrolisboa.pt/status/getLinhas.php) | Delays in subway lines | No | No | No |
 | [Navitia](https://api.navitia.io/) | The open API for building cool stuff with transport data | `apiKey` | Yes | Unknown |