Remove unused kLogMessageAndDeliveryTime

We have support for packing both data and time into a MessageHeader.
Stop doing that since nobody uses it.

Change-Id: I9cccdce089def3c1bc335f8620cdaa3d233739d6
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
Signed-off-by: James Kuszmaul <james.kuszmaul@bluerivertech.com>
diff --git a/aos/events/logging/logfile_utils_test.cc b/aos/events/logging/logfile_utils_test.cc
index 30a0ada..cba74ed 100644
--- a/aos/events/logging/logfile_utils_test.cc
+++ b/aos/events/logging/logfile_utils_test.cc
@@ -3254,7 +3254,7 @@
 
   for (const LogType type :
        {LogType::kLogMessage, LogType::kLogDeliveryTimeOnly,
-        LogType::kLogMessageAndDeliveryTime, LogType::kLogRemoteMessage}) {
+        LogType::kLogRemoteMessage}) {
     for (int i = 0; i < 100; ++i) {
       aos::Context context = RandomContext();
       const uint32_t channel_index =