cowsay: remove offensive cows

it's basically the same art in both

homebrew, debian, and fedora also do not ship these cows

srcpkgs/cowsay/template

@@ -1,7 +1,7 @@
 # Template file for 'cowsay'
 pkgname=cowsay
 version=3.04
-revision=3
+revision=4
 depends="perl"
 short_desc="Configurable speaking/thinking cow (and a bit more)"
 maintainer="Leah Neukirchen <leah@vuxu.org>"
@@ -20,4 +20,5 @@ do_install() {
 	ln -s cowsay ${DESTDIR}/usr/bin/cowthink
 	vman cowsay.1
 	vcopy cows usr/share
+	rm "${DESTDIR}"/usr/share/cows/{sodomized,telebears}.cow
 }