superfluous data exported to Features

We have resolved some more urgent bugs, so I think it is time to take a closer look at this as it could cause some unforeseen issues down the road.

Thanks for reporting,
Chris

Confirmed latest version of Features (2.0) and Facet API. Raw export is below, you can see the "submit_realm" as mentioned in the OP.

/**
 * Implements hook_facetapi_default_facet_settings().
 */
function facet_api_test_facetapi_default_facet_settings() {
  $export = array();

  $facet = new stdClass();
  $facet->disabled = FALSE; /* Edit this to true to make a default facet disabled initially */
  $facet->api_version = 1;
  $facet->name = 'apachesolr@solr::created';
  $facet->searcher = 'apachesolr@solr';
  $facet->realm = '';
  $facet->facet = 'created';
  $facet->enabled = FALSE;
  $facet->settings = array(
    'operator' => 'and',
    'hard_limit' => '50',
    'dependencies' => array(
      'roles' => array(),
      'bundle' => 'none',
      'bundle_selected' => array(),
    ),
    'facet_mincount' => 1,
    'facet_missing' => 0,
    'flatten' => 0,
    'query_type' => 'date',
    'limit_active_items' => 0,
    'date_granularity' => 'YEAR',
  );
  $export['apachesolr@solr::created'] = $facet;

  $facet = new stdClass();
  $facet->disabled = FALSE; /* Edit this to true to make a default facet disabled initially */
  $facet->api_version = 1;
  $facet->name = 'apachesolr@solr:block:created';
  $facet->searcher = 'apachesolr@solr';
  $facet->realm = 'block';
  $facet->facet = 'created';
  $facet->enabled = TRUE;
  $facet->settings = array(
    'weight' => 0,
    'widget' => 'facetapi_links',
    'filters' => array(),
    'active_sorts' => array(
      'active' => 'active',
      'indexed' => 'indexed',
      'count' => 0,
      'display' => 0,
    ),
    'sort_weight' => array(
      'active' => '-50',
      'indexed' => '-49',
      'count' => '0',
      'display' => '0',
    ),
    'sort_order' => array(
      'active' => '3',
      'indexed' => '4',
      'count' => '4',
      'display' => '4',
    ),
    'empty_behavior' => 'none',
    'facet_more_text' => 'Show more',
    'facet_fewer_text' => 'Show fewer',
    'soft_limit' => '20',
    'nofollow' => 1,
    'show_expanded' => 0,
    'empty_text' => array(
      'value' => '',
      'format' => 'filtered_html',
    ),
    'submit_realm' => 'Save and go back to realm settings',
  );
  $export['apachesolr@solr:block:created'] = $facet;

  return $export;
}

Facet API has an admittedly janky system to capture the values from the setting form as I did not know about form_state_values_clean() at the time I created the module.

The attached patch uses Facet API's custom mechanism to remove the value referenced in the OP.

I was bold and committed the fix since this is a small change that will have no adverse effects.