code: public AddonChange removeAddon(String appName, String addonName) {
          return connection.execute(new AddonRemove(appName, addonName), apiKey);
      }
docs: Remove an addon from an app.
  @param appName App name. See {@link #listApps} for a list of apps that can be used.
  @param addonName Addon name. See {@link #listAppAddons} for a list of addons that can be used.
  @return the request object