Remove duplicate REST API section

The listeners section was duplicated. Also fixed a typo.

Documentation/REST-API/Resources-Service.md

@@ -258,41 +258,7 @@ GET /v1/services/:name/listeners
 }
 ```
 
-### Get service listeners
+### Get a single service listener
-
-Get the listeners of a service. The _:name_ in the URI must be a valid service
-name with all whitespace replaced with hyphens.
-
-```
-GET /v1/services/:name/listeners
-```
-
-#### Response
-
-`Status: 200 OK`
-
-```javascript
-{
-    "links": {
-        "self": "http://localhost:8989/v1/services/Read-Connection-Router/listeners"
-    },
-    "data": [
-        {
-            "attributes": {
-                "parameters": {
-                    "port": 4008,
-                    "protocol": "MariaDBClient",
-                    "authenticator": "MySQLAuth"
-                }
-            },
-            "id": "Read-Connection-Listener",
-            "type": "listeners"
-        }
-    ]
-}
-```
-
-### Get a sigle service listener
 
 Get the listeners of a service. The _:name_ in the URI must be a valid service
 name and _:listener_ must be a valid listener name, both with all whitespace