FR 1971637: make "stash_track_decay = true" and "stash_remove_decay = true"

the hardcoded behaviour and remove the options, meaning that rotted-away flesh chunks will always be removed from the stash tracker.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6377 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on July 3, 2008
GS7PUVWLNAES5T63EPWQDYRZMNBIUC5DDHNX3P6NEUK53AMGLE4QC
Change contents