Removed senseless rN++ explanation.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6262 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dploog  on June 30, 2008
MTKEVL25B4L4UGR6EPYW5XZ6F3FZXZ5TLLIVA4RXN5YH4E5GBNNQC
Change contents