[Autotest]Remove sync_time in android_xmlrpc_server

The adb_host does time sync on the host and the DUT. So this
call is not needed here. Re-doing here causes "bad date" error.

Change-Id: I48ddafe4b2c3d201083aff709a85f533479fb321
Reviewed-on: https://chromium-review.googlesource.com/355213
Tested-by: Bindu Mahadev <bmahadev@chromium.org>
Reviewed-by: Roshan Pius <rpius@chromium.org>
diff --git a/client/cros/networking/android_xmlrpc_server.py b/client/cros/networking/android_xmlrpc_server.py
index 64c5e8a..6f248f8 100755
--- a/client/cros/networking/android_xmlrpc_server.py
+++ b/client/cros/networking/android_xmlrpc_server.py
@@ -240,7 +240,7 @@
         @param epoch_seconds: float number of seconds from the epoch.
 
         """
-        self.ad.droid.setTime(epoch_seconds)
+        # The adb_host is already doing this; just return True.
         return True