multiplex: Remove mentions of deprecated zrtp_receiver from zrtp class

src/zrtp.cc

@@ -35,7 +35,6 @@ uvgrtp::zrtp::zrtp():
     remote_addr_(),
     remote_ip6_addr_(),
     initialized_(false),
-    receiver_(),
     hello_(nullptr),
     hello_ack_(nullptr),
     commit_(nullptr),

src/zrtp.hh

@@ -189,9 +189,6 @@ namespace uvgrtp {
             zrtp_capab_t capab_;
             zrtp_capab_t rcapab_;
 
-            /* ZRTP packet receiver */
-            uvgrtp::zrtp_msg::receiver receiver_;
-
             zrtp_crypto_ctx_t cctx_;
             zrtp_session_t session_;
 

src/zrtp/zrtp_receiver.hh

@@ -14,6 +14,8 @@ namespace uvgrtp {
 
     namespace zrtp_msg {
 
+        /* NOTE: This class was deprecated when socket multiplexing was introduced.
+         * All reception is done in reception_flow class */
         class receiver {
             public:
                 receiver();