device-oneplus-fajita: drop unnecessary systemd subpackage function

The default_systemd function already does what we want if we place the
files in the right directories

Signed-off-by: Pablo Correa Gómez <pabloyoyoista@postmarketos.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7489>

device/community/device-oneplus-fajita/APKBUILD

@@ -3,7 +3,7 @@ maintainer="Casey Connolly <kcxt@postmarketos.org>"
 pkgname=device-oneplus-fajita
 pkgdesc="OnePlus 6T"
 pkgver=18
-pkgrel=3
+pkgrel=4
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"
@@ -52,6 +52,8 @@ package() {
 	install -Dm644 "$srcdir"/q6voiced.conf "$pkgdir"/etc/conf.d/q6voiced
 	install -Dm644 "$srcdir"/hexagonrpcd.confd \
 		"$pkgdir"/usr/share/hexagonrpcd/hexagonrpcd-sdsp.conf
+	install -Dm644 "$srcdir"/80-device-oneplus-fajita.preset \
+		-t "$pkgdir"/usr/lib/systemd/system-preset
 }
 
 openrc() {
@@ -66,12 +68,6 @@ pmtest() {
 	mkdir -p "$subpkgdir"
 }
 
-systemd() {
-	install -Dm644 -t "$subpkgdir"/usr/lib/systemd/system-preset \
-		"$srcdir"/80-device-oneplus-fajita.preset
-	default_systemd
-}
-
 sha512sums="
 a264975530349a59784de2fb17631013c5e03f204f356949c95e72d20c91ff329c57e2d79024f0cf423ac3645243e0273661d705011dd2c37e65acb3f76518b3  deviceinfo
 6b5308471fcbb938ac00d6e9a3f8e61073bda1d608f2edf1a2aba4b256dd3f76b1ccee0873dcaa8dc4a8db304d433360a56fe447d70f57ba068428b75ddea236  hexagonrpcd.confd