mail-client/roundcube: remove Makefile in -9999

Closes: https://bugs.gentoo.org/802411
Package-Manager: Portage-3.0.20, Repoman-3.0.3
Signed-off-by: Craig Andrews <candrews@gentoo.org>

mail-client/roundcube/roundcube-9999.ebuild

@@ -59,6 +59,7 @@ src_unpack() {
 	if [[ "${PV}" == *9999* ]]; then
 		git-r3_src_unpack
 		pushd "${S}" > /dev/null || die
+		rm Makefile || die
 		mv composer.json-dist composer.json || die
 		composer install --no-dev || die
 		./bin/install-jsdeps.sh || die