Remove journal entries for failed sdbusplus calls

Calling code is already handling any missing method
call response data appropriately, and many times
the failed call is expected.

For example, any time there is a dbus monitor rule
that watches a property, it will try to read that
property right away on startup to cache the value
if possible.  It's possible that some D-Bus objects
may not exist at that moment in time, and the code
already expects that.

Tested:  No more 'Failed to parse method response'
         journal entries.

Change-Id: Iaa84020a34a96395abf7a3460c96ec0dc255fa23
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/src/sdbusplus.hpp b/src/sdbusplus.hpp
index 4339bad..f37f7de 100644
--- a/src/sdbusplus.hpp
+++ b/src/sdbusplus.hpp
@@ -83,9 +83,8 @@
         }
         catch (const SdBusError& e)
         {
-            log<level::ERR>("Failed to parse method response",
-                            entry("ERROR=%s", e.what()),
-                            entry("REPLY_SIG=%s", respMsg.get_signature()));
+            // Empty responses are expected sometimes, and the calling
+            // code is set up to handle it.
         }
         return resp;
     }