removed unnecessary enum value for message queue.
removed unnecessary enum value for message queue.

Change-Id: I75393da0348cdc32cf3ea08c0b81709d6820cdb6
Signed-off-by: jihwan.seo <69598d7552022c520cfdbefd16641727c7ff4ab5@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/10589
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Jaehong Jo <69db334b3f87f30654728856fde276b43c835fe5@samsung.com>
Reviewed-by: Ashok Babu Channa <72ac47ef856ca3d131a57cba474ebed48591eeff@samsung.com>

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