omit useless test
diff --git a/src/event/ngx_event_openssl.c b/src/event/ngx_event_openssl.c
index 88972f5..57fb3e8 100644
--- a/src/event/ngx_event_openssl.c
+++ b/src/event/ngx_event_openssl.c
@@ -1426,10 +1426,6 @@
 
     cache = shm_zone->data;
 
-    if (cache->session_rbtree == NULL) {
-        return NULL;
-    }
-
     sess = NULL;
 
     shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;