No need to call drupal_(un)install_schema functions

Accordingly to this page http://api.drupal.org/api/drupal/modules%21system%21system.api.php/funct...

There is no need to call drupal_install_schema and drupal_uninstall_schema directly

/**
 * Implementation of hook_install().
 */
function simplenews_realname_install() {
  drupal_install_schema('simplenews_realname');
}

/**
 * Implementation of hook_uninstall().
 */
function simplenews_realname_uninstall() {
  drupal_uninstall_schema('simplenews_realname');
}

because of this calls during installation of this moddule I see error:

DatabaseSchemaObjectExistsException: Table <em class="placeholder">simplenews_realname</em> already exists. in DatabaseSchema->createTable() (line 657 of /includes/database/schema.inc).

You try to create table manually , after drupal has created it automatically.

Removing this two hooks solves this problem