Merge pull request #14 from ruebot/7.x-1.4-ISLANDORA-977

ISLANDORA-977 -- Delete drupal variables on uninstall.

islandora_checksum_checker.install

@@ -10,3 +10,18 @@
 function islandora_checksum_checker_install() {
   variable_set('islandora_checksum_checker_last_item_checked', '0');
 }
+
+/**
+ * Implements hook_uninstall().
+ */
+function islandora_checksum_checker_uninstall() {
+  $variables = array(
+    'islandora_checksum_checker_queue_cron_method',
+    'islandora_checksum_checker_items_per_cron',
+    'islandora_checksum_checker_dsids_to_check',
+    'islandora_checksum_checker_email_reports_to',
+    'islandora_checksum_checker_send_complete_message',
+    'islandora_checksum_checker_log_mismatches',
+  );
+  array_walk($variables, 'variable_del');
+}