#361130 by Dave Reid: Clean up comment variables on uninstall.

modules/comment/comment.install

@@ -15,6 +15,21 @@ function comment_install() {
 function comment_uninstall() {
   // Remove tables.
   drupal_uninstall_schema('comment');
+
+  // Remove variables.
+  variable_del('comment_block_count');
+  $node_types = array_keys(node_get_types());
+  foreach ($node_types as $node_type) {
+    variable_del('comment_' . $node_type);
+    variable_del('comment_anonymous_' . $node_type);
+    variable_del('comment_controls_' . $node_type);
+    variable_del('comment_default_mode_' . $node_type);
+    variable_del('comment_default_order_' . $node_type);
+    variable_del('comment_default_per_page_' . $node_type);
+    variable_del('comment_form_location_' . $node_type);
+    variable_del('comment_preview_' . $node_type);
+    variable_del('comment_subject_field_' . $node_type);
+  }
 }
 
 /**