Remove cleanup on exit

Hey if you wanna save bandwidth and be nicer to distro maintainers, you probably shouldn't delete your tarball after every attempt

gentoostrap.sh

@@ -103,7 +103,6 @@ build-gentoo() {
 		touch "$file"
 		chmod 0600 "$file"
 	done
-	trap "cleanup $stage3file" EXIT
 	# We grab the checksums first to verify the integrity of any tarball leftover from a previous run
 	log "Downloading stage3 signature"
 	curl -s "$stage3.DIGESTS" -o "$stage3sig"