--- a/src/http/ngx_http_variables.h
+++ b/src/http/ngx_http_variables.h
@@ -88,19 +88,6 @@ ngx_int_t ngx_http_variables_add_core_va
 ngx_int_t ngx_http_variables_init_vars(ngx_conf_t *cf);
 
 
-typedef struct {
-    ngx_rbtree_node_t             node;
-    size_t                        len;
-    ngx_http_variable_value_t    *value;
-} ngx_http_variable_value_node_t;
-
-
-void ngx_http_variable_value_rbtree_insert(ngx_rbtree_node_t *temp,
-    ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
-ngx_http_variable_value_t *ngx_http_variable_value_lookup(ngx_rbtree_t *rbtree,
-    ngx_str_t *name, uint32_t hash);
-
-
 extern ngx_http_variable_value_t  ngx_http_variable_null_value;
 extern ngx_http_variable_value_t  ngx_http_variable_true_value;