rc: if cleaning is actually needed, we have bigger problems later

src/etc/rc

@@ -53,12 +53,6 @@ done
 if _tmpdir=$(mktemp -d -q /.diskless.XXXXXX); then
 	# only remove the directory
 	rmdir ${_tmpdir}
-
-	# cleanup configuration files from previous instance
-	# (does not work with install media unfortunately)
-	/bin/rm -rf /var/run/*
-	/bin/rm -rf /var/etc/*
-	/bin/rm -rf /var/tmp/*
 else
 	# fake a writeable environment in some subdirs
 	for i in conf etc home root usr var; do