diff --git a/rogueviz/staircase.cpp b/rogueviz/staircase.cpp
index 9920cde4..2fb409d8 100644
--- a/rogueviz/staircase.cpp
+++ b/rogueviz/staircase.cpp
@@ -1,9 +1,6 @@
 // Hyperbolic Rogue: staircase simulation in RogueViz
 // Copyright (C) 2011-2018 Zeno and Tehora Rogue, see 'hyper.cpp' for details
 
-// Kohonen's self-organizing networks. 
-// This is a part of RogueViz, not a part of HyperRogue.
-
 #include "rogueviz.h"
 
 namespace rogueviz { namespace staircase {