ExchageContext: remove unused flag

src/messaging/ReliableMessageContext.h

@@ -192,17 +192,14 @@ class ReliableMessageContext
         /// some message we have needed to acknowledge in the past.
         kFlagAckMessageCounterIsValid = (1u << 6),
 
-        /// When set, signifies that at least one message has been received from peer on this exchange context.
-        kFlagMsgRcvdFromPeer = (1u << 7),
-
         /// When set, signifies that this exchange is waiting for a call to SendMessage.
-        kFlagWillSendMessage = (1u << 8),
+        kFlagWillSendMessage = (1u << 7),
 
         /// When set, we have had Close() or Abort() called on us already.
-        kFlagClosed = (1u << 9),
+        kFlagClosed = (1u << 8),
 
         /// When set, signifies that the exchange is requesting Sleepy End Device fast-polling mode.
-        kFlagFastPollingMode = (1u << 10),
+        kFlagFastPollingMode = (1u << 9),
     };
 
     BitFlags<Flags> mFlags; // Internal state flags
@@ -244,11 +241,6 @@ inline bool ReliableMessageContext::IsAckPending() const
     return mFlags.Has(Flags::kFlagAckPending);
 }
 
-inline bool ReliableMessageContext::HasRcvdMsgFromPeer() const
-{
-    return mFlags.Has(Flags::kFlagMsgRcvdFromPeer);
-}
-
 inline bool ReliableMessageContext::IsMessageNotAcked() const
 {
     return mFlags.Has(Flags::kFlagMessageNotAcked);
@@ -274,11 +266,6 @@ inline void ReliableMessageContext::SetAutoRequestAck(bool autoReqAck)
     mFlags.Set(Flags::kFlagAutoRequestAck, autoReqAck);
 }
 
-inline void ReliableMessageContext::SetMsgRcvdFromPeer(bool inMsgRcvdFromPeer)
-{
-    mFlags.Set(Flags::kFlagMsgRcvdFromPeer, inMsgRcvdFromPeer);
-}
-
 inline void ReliableMessageContext::SetAckPending(bool inAckPending)
 {
     mFlags.Set(Flags::kFlagAckPending, inAckPending);