games-engines/scummvm: Fix xdg.eclass usage

Package-Manager: Portage-2.3.62, Repoman-2.3.12
Signed-off-by: Pacho Ramos <pacho@gentoo.org>

games-engines/scummvm/scummvm-2.0.0-r1.ebuild

@@ -43,7 +43,7 @@ S="${WORKDIR}/${P/_/}"
 PATCHES=( "${FILESDIR}/${PN}-2.0.0-freetype_pkgconfig.patch" )
 
 src_prepare() {
-	default
+	xdg_src_prepare
 
 	# -g isn't needed for nasm here
 	sed -i \
@@ -96,15 +96,3 @@ src_install() {
 	default
 	doicon -s scalable icons/scummvm.svg
 }
-
-pkg_preinst() {
-	xdg_pkg_preinst
-}
-
-pkg_postinst() {
-	xdg_pkg_postinst
-}
-
-pkg_postrm() {
-	xdg_pkg_postrm
-}