Removed "placegoat" (shut down)

Removed "placegoat" since it has been shut down. (Source: https://github.com/rosshettel/placegoat)

README.md

@@ -65,7 +65,6 @@ API | Description | Auth | HTTPS | CORS |
 | [HTTPCat](https://http.cat/) | Cat for every HTTP Status | No | Yes | Unknown |
 | [IUCN](http://apiv3.iucnredlist.org/api/v3/docs) | IUCN Red List of Threatened Species | `apiKey` | No | Unknown |
 | [Movebank](https://github.com/movebank/movebank-api-doc) | Movement and Migration data of animals | No | Yes | Unknown |
-| [PlaceGOAT](https://placegoat.com/) | Placeholder goat images | No | Yes | Unknown |
 | [RandomCat](https://aws.random.cat/meow) | Random pictures of cats | No | Yes | Yes |
 | [RandomDog](https://random.dog/woof.json) | Random pictures of dogs | No | Yes | Yes |
 | [RandomFox](https://randomfox.ca/floof/) | Random pictures of foxes | No | Yes | No |