code: public WebhookCluster removeWebhooks(WebhookClient... clients)
      {
          Checks.notNull(clients, "Clients");
          webhooks.removeAll(Arrays.asList(clients));
          return this;
      }
docs: Removes the specified {@link net.dv8tion.jda.webhook.WebhookClient WebhookClients}
  from this cluster's list of receivers.
  <br>It does not matter whether any of the provided clients is actually in the list of receivers.
  
  <p><b>Note that the removed clients are not closed by this operation!</b>
  
  @param  clients
  WebhookClients to remove
  
  @throws java.lang.IllegalArgumentException
  If the provided array is {@code null}
  
  @return The current WebhookCluster for chaining convenience