Issue #2469383 by DamienMcKenna: Settings do not upgrade correctly

between D6 and D7

realname.install

@@ -119,3 +119,24 @@ function realname_update_7000() {
   );
   db_change_field('realname', 'realname', 'realname', $fields['realname']);
 }
+
+/**
+ * Remove variables from D6 that are no longer needed.
+ */
+function realname_update_7001() {
+  variable_del('realname_fields');
+  variable_del('realname_homepage');
+  variable_del('realname_max_username');
+  variable_del('realname_myacct');
+  variable_del('realname_nodeapi');
+  variable_del('realname_nofollow');
+  variable_del('realname_notver');
+  variable_del('realname_profile_module');
+  variable_del('realname_recalculate');
+  variable_del('realname_search_enable');
+  variable_del('realname_search_login');
+  variable_del('realname_theme');
+  variable_del('realname_user_disable');
+  variable_del('realname_use_title');
+  variable_del('realname_view');
+}