phosphor: systemd: Remove kmod and sysvinit modules

These are not used by most OpenBMC systems. Disabling these modules
appears to reduce the squashfs size by 56KB for build of Witherspoon.

Change-Id: I6e895639de5e1a1966abe2df9f87b24946ca42b3
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/meta-phosphor/recipes-core/systemd/systemd_%.bbappend b/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
index beffdb9..b09f2e2 100644
--- a/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
+++ b/meta-phosphor/recipes-core/systemd/systemd_%.bbappend
@@ -2,7 +2,6 @@
 PACKAGECONFIG = "\
         coredump \
         hostnamed \
-        kmod \
         networkd \
         nss \
         pam \
@@ -10,7 +9,6 @@
         resolved \
         seccomp \
         sysusers \
-        sysvinit \
         timedated \
         timesyncd \
         zstd \