--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -1973,87 +1973,3 @@ ngx_http_variables_init_vars(ngx_conf_t 
 
     return NGX_OK;
 }
-
-
-void
-ngx_http_variable_value_rbtree_insert(ngx_rbtree_node_t *temp,
-    ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
-{
-    ngx_rbtree_node_t               **p;
-    ngx_http_variable_value_node_t   *vvn, *vvt;
-
-    for ( ;; ) {
-
-        vvn = (ngx_http_variable_value_node_t *) node;
-        vvt = (ngx_http_variable_value_node_t *) temp;
-
-        if (node->key != temp->key) {
-
-            p = (node->key < temp->key) ? &temp->left : &temp->right;
-
-        } else if (vvn->len != vvt->len) {
-
-            p = (vvn->len < vvt->len) ? &temp->left : &temp->right;
-
-        } else {
-            p = (ngx_memcmp(vvn->value->data, vvt->value->data, vvn->len) < 0)
-                 ? &temp->left : &temp->right;
-        }
-
-        if (*p == sentinel) {
-            break;
-        }
-
-        temp = *p;
-    }
-
-    *p = node;
-    node->parent = temp;
-    node->left = sentinel;
-    node->right = sentinel;
-    ngx_rbt_red(node);
-}
-
-
-ngx_http_variable_value_t *
-ngx_http_variable_value_lookup(ngx_rbtree_t *rbtree, ngx_str_t *val,
-    uint32_t hash)
-{
-    ngx_int_t                        rc;
-    ngx_rbtree_node_t               *node, *sentinel;
-    ngx_http_variable_value_node_t  *vvn;
-
-    node = rbtree->root;
-    sentinel = rbtree->sentinel;
-
-    while (node != sentinel) {
-
-        vvn = (ngx_http_variable_value_node_t *) node;
-
-        if (hash != node->key) {
-            node = (hash < node->key) ? node->left : node->right;
-            continue;
-        }
-
-        if (val->len != vvn->len) {
-            node = (val->len < vvn->len) ? node->left : node->right;
-            continue;
-        }
-
-        rc = ngx_memcmp(val->data, vvn->value->data, val->len);
-
-        if (rc < 0) {
-            node = node->left;
-            continue;
-        }
-
-        if (rc > 0) {
-            node = node->right;
-            continue;
-        }
-
-        return vvn->value;
-    }
-
-    return NULL;
-}