Don't build the Netbeans Installer modules.

Index: netbeans-7.0.1+dfsg1/nbbuild/cluster.properties
===================================================================
--- netbeans-7.0.1+dfsg1.orig/nbbuild/cluster.properties	2011-08-02 23:37:27.294165081 +0100
+++ netbeans-7.0.1+dfsg1/nbbuild/cluster.properties	2011-08-02 23:37:32.884164057 +0100
@@ -648,8 +648,6 @@
         apisupport.harness,\
         jellytools.platform,\
         jemmy,\
-        libs.nbi.ant,\
-        libs.nbi.engine,\
         nbjunit,\
         o.n.insane
 
