remove stale comment

src/core/ngx_resolver.c

diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
index 0352738..1549cb5 100644
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -89,8 +89,6 @@
 static void *ngx_resolver_dup(ngx_resolver_t *r, void *src, size_t size);
 
 
-/* STUB: ngx_peer_addr_t * */
-
 ngx_resolver_t *
 ngx_resolver_create(ngx_conf_t *cf, ngx_addr_t *addr)
 {