mymodule.install

<?php

/**
 * Disable and uninstall a feature module.
 *
 * Note: see some edge cases where some exported components like content types
 * need to be removed manually.
 */
function mymodule_update_7100() {
  // Note that this does not take care of disabling modules that depend
  // on this one.
  module_disable(array('some_module'));
  drupal_uninstall_modules(array('some_module));
}


/**
 * Delete a field definition and all of its instances.
 */
function mymodule_update_7100(&$sandbox) {
  field_delete_field('field_name');
  field_purge_batch(1000);
}

/**
 * Delete a content type and taxonomy contained in a feature before disabling it.
 *
 * Based on http://drupal.stackexchange.com/questions/44547/unable-to-delete-feature-content-type-after-uninstalling-feature/.
 */
function mymodule_update_7100(&$sandbox) {
  $content_type = 'content_type_to_delete';
  $module = 'feature_module_where_its_exported';

  // Make content type's fields deletable.
  db_query("UPDATE {node_type} SET custom = 1, locked = 0 WHERE type = :ctype", array(':ctype' => $content_type));

  // Clean Drupal cache; this is necessary for the content type too be 'deletable'.
  drupal_flush_all_caches();
  node_type_delete($content_type);
  module_disable(array($module));
  drupal_uninstall_modules(array($module));

  // Delete taxonomies.
  $machine_names = array('exported_taxonomy1', 'exported_taxonomy2');
  foreach ($machine_names as $machine_name) {
    $taxonomy = taxonomy_vocabulary_machine_name_load($machine_name);
    taxonomy_vocabulary_delete($taxonomy->vid);
  }
}