net-misc/taylor-uucp: restore default shell after unemerge

Since user 'uucp' is being modified after emerge, it needs to be reset
to default after unemerge.

Signed-off-by: Conrad Kostecki <conikost@gentoo.org>

net-misc/taylor-uucp/taylor-uucp-1.07-r5.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -63,3 +63,7 @@ src_install() {
 pkg_preinst() {
 	usermod -s /bin/bash uucp || die
 }
+
+pkg_postrm() {
+	usermod -s /bin/false uucp || die
+}