Removed mutation depth restriction as suggested by the mutant overlords of ##crawl.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3658 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on March 15, 2008
BZC4SQHQJSDAJKSVQCW6ZUUT7FVAPWID5GF3E4RGWZY25OTG7AFAC
Change contents