--- a/src/core/ngx_rbtree.c
+++ b/src/core/ngx_rbtree.c
@@ -13,12 +13,6 @@
  * the "Introduction to Algorithms" by Cormen, Leiserson and Rivest.
  */
 
-#define ngx_rbt_red(node)           ((node)->color = 1)
-#define ngx_rbt_black(node)         ((node)->color = 0)
-#define ngx_rbt_is_red(node)        ((node)->color)
-#define ngx_rbt_is_black(node)      (!ngx_rbt_is_red(node))
-#define ngx_rbt_copy_color(n1, n2)  (n1->color = n2->color)
-
 
 static ngx_inline void ngx_rbtree_left_rotate(ngx_rbtree_node_t **root,
     ngx_rbtree_node_t *sentinel, ngx_rbtree_node_t *node);