mail-client/neomutt: fix live ebuild src dir

Commit e4ef3e09ea dropped the assignment of "S", changing its value
from "${WORKDIR}/${PN}-${P}" to the default value of
"${WORKDIR}/${P}". However, the live ebuild still checkouts out source
code to previous location so portage says the source directory doesn't
exist.

This commit drops the custom checkout directory and uses the default
value provided, which corresponds to the default value of "S".

Closes: https://bugs.gentoo.org/756166

Signed-off-by: Austin Ray <austin@austinray.io>
Signed-off-by: Nicolas Bock <nicolasbock@gentoo.org>

mail-client/neomutt/neomutt-99999999.ebuild

@@ -8,7 +8,6 @@ inherit eutils
 if [[ ${PV} =~ 99999999$ ]]; then
 	inherit git-r3
 	EGIT_REPO_URI="https://github.com/neomutt/neomutt.git"
-	EGIT_CHECKOUT_DIR="${WORKDIR}/neomutt-${P}"
 else
 	SRC_URI="https://github.com/${PN}/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
 	KEYWORDS="~amd64 ~ppc64 ~x86"