remove unused endpoints

Signed-off-by: sowjanyakch <sowjanya.kch@gmail.com>

app/src/main/java/com/nextcloud/talk/api/NcApi.java

@@ -118,19 +118,6 @@ public interface NcApi {
                                        @Url String url,
                                        @QueryMap Map<String, String> options);
 
-    /*
-        QueryMap items are as follows:
-            - "roomName" : "newName"
-
-        Server URL is: baseUrl + ocsApiVersion + spreedApiVersion + /room/roomToken
-     */
-
-    @FormUrlEncoded
-    @PUT
-    Observable<GenericOverall> setConversationDescription(@Header("Authorization") String authorization,
-                                                          @Url String url,
-                                                          @Field("description") String description);
-
     /*
         QueryMap items are as follows:
             - "newParticipant" : "user"