diff --git a/link.install b/link.install
index 14e745d..e1820f7 100644
--- a/link.install
+++ b/link.install
@@ -115,3 +115,17 @@ function link_update_7001() {
     }
   }
 }
+
+/**
+ * Removes unused link_extra_domains variable.
+ */
+function link_update_7002() {
+  variable_del('link_extra_domains');
+}
+
+/**
+ * Implements hook_uninstall().
+ */
+function link_uninstall() {
+  variable_del('link_allowed_domains');
+}
diff --git a/link.module b/link.module
index a519432..315f3d1 100644
--- a/link.module
+++ b/link.module
@@ -1382,8 +1382,8 @@ function link_url_type($text) {
 }
 
 /**
- * Returns the list of allowed domains, including domains added by admins via
- * variable_set/$config.
+ * Returns the list of allowed domains.
+ *
  * If the variable link_allowed_domains is set, restrict allowed domains to the
  * strings in that array. If the variable link_allowed_domains is not set, allow
  * all domains between 2 and 63 characters in length.