plymouth: do not install systemd units manually

They are installed properly by plymouth itself. With buildhistory no change
in packed files could be detected.

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-core/plymouth/plymouth_0.9.2.bb

@@ -42,9 +42,6 @@ LOGO ??= "${datadir}/plymouth/bizcom.png"
 inherit autotools pkgconfig systemd
 
 do_install_append() {
-    install -d ${D}${systemd_unitdir}/system
-    install -m 644 ${B}/systemd-units/*.service ${D}${systemd_unitdir}/system
-    install -m 644 ${B}/systemd-units/systemd-ask-password-plymouth.path ${D}${systemd_unitdir}/system
     # Remove /var/run from package as plymouth will populate it on startup
     rm -fr "${D}${localstatedir}/run"