Remove BUILDING_NOTE_EXTENSION from docs
diff --git a/Doc/Manual/Preprocessor.html b/Doc/Manual/Preprocessor.html
index f09067b..b395798 100644
--- a/Doc/Manual/Preprocessor.html
+++ b/Doc/Manual/Preprocessor.html
@@ -121,7 +121,6 @@
 SWIGJAVASCRIPT                  Defined when using Javascript
 SWIG_JAVASCRIPT_JSC             Defined when using Javascript for JavascriptCore
 SWIG_JAVASCRIPT_V8              Defined when using Javascript for v8 or node.js
-BUILDING_NODE_EXTENSION         Defined when using Javascript for node.js
 SWIGLUA                         Defined when using Lua
 SWIGMZSCHEME                    Defined when using Mzscheme
 SWIGOCAML                       Defined when using OCaml