meta-google: console: remove service dependency

Remove service dependency so that serial will not be delayed by
network.target.

Signed-off-by: David Wang <davidwang@quantatw.com>
Change-Id: I6febe89373a5e1c845b998905305aafe25744380
diff --git a/meta-google/recipes-phosphor/console/obmc-console/serial-to-host@.service.in b/meta-google/recipes-phosphor/console/obmc-console/serial-to-host@.service.in
index c38b720..578568e 100644
--- a/meta-google/recipes-phosphor/console/obmc-console/serial-to-host@.service.in
+++ b/meta-google/recipes-phosphor/console/obmc-console/serial-to-host@.service.in
@@ -1,8 +1,7 @@
 [Unit]
 Description=Host Serial Getty on %I
 BindsTo=dev-%i.device
-After=dev-%i.device systemd-user-sessions.service
-After=rc-local.service
+After=dev-%i.device
 Before=getty.target
 IgnoreOnIsolate=yes