code: public App removeSetting(String name) {
  		if (!StringUtils.isBlank(name)) {
  			Object result = getSettings().remove(name);
  			if (result != null) {
  				for (AppSettingRemovedListener listener : REMOVE_SETTING_LISTENERS) {
  					listener.onSettingRemoved(this, name);
  					logger.debug("Executed {}.onSettingRemoved().", listener.getClass().getName());
  				}
  			}
  		}
  		return this;
  	}
docs: Removes a setting from the map.
  @param name the key
  @return this