Revert "makechrootpkg: with -n, check if the package failed to install"

This reverts commit be44b9cde1.

This was a nice idea in theory, because it means that we can catch
conflicting files before releasing them into the repos. In practice,
there were unanticipated side effects: single-package installs which
conflict against their own makedepends cannot be installed either.
Examples include:
- kernel modules which makedepend on their dkms equivalent
- jack2, which makedepends/optdepends on portaudio, which requires
  jack... but jack2 is a drop-in provides/conflicts jack.

We cannot reliably detect when makepkg --install will error out because
of dependency conflicts vs. packages which are simply broken. So, back
out this change for now.

Revisit this once pacutils has a new release, because it will add the
option --resolve-conflicts=all, allowing for much better scripted
responses to "foo conflicts with bar, remove bar? [y/N]" than simply
"--noconfirm and fail".

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

makechrootpkg.in

@@ -232,15 +232,8 @@ _chrootbuild() {
 	sudo --preserve-env=SOURCE_DATE_EPOCH -iu builduser bash -c 'cd /startdir; makepkg "$@"' -bash "$@"
 	ret=$?
 	case $ret in
-		0)
+		0|14)
 			return 0;;
-		14)
-			# whitelist "The package failed to install." but only if there are multiple split packages
-			# in which case they might be conflicting
-			local pkgfiles=(/pkgdest/*.pkg.tar.xz)
-			(( ${#pkgfiles[@]} > 1))
-			return $?;;
-
 		*)
 			return $ret;;
 	esac