code: public SubscriptionResponse deleteSubscription(String id) throws InstagramException {
          final OAuthRequest request = prepareOAuthRequest(Verbs.DELETE);
          request.addQuerystringParameter("id", id);
  
          try {
              final Response response = request.send();
              return getSubscriptionResponse(response.getBody());
          } catch (IOException e) {
              throw new InstagramException("Failed to delete subscription with id ["+id+"]", e);
          }
      }
docs: Deletes a subscription with the specified identifier.
  
  @param id the id of the subscription to remove