transceiver: Remove clock indications from control path

Clock indications should only be sent after the radio is started
and running. Otherwise, clock indications are sent too early in the
power on process causing improper function if the indications are
used to signal a running radio.

Signed-off-by: Tom Tsou <tom.tsou@ettus.com>

Transceiver52M/Transceiver.cpp

@@ -271,7 +271,6 @@ bool Transceiver::start()
                             TxUpperLoopAdapter, (void*) chan);
   }
 
-  writeClockInterface();
   mOn = true;
   return true;
 }
@@ -716,9 +715,6 @@ void Transceiver::driveControl(size_t chan)
 
   sscanf(buffer,"%3s %s",cmdcheck,command);
 
-  if (!chan)
-    writeClockInterface();
-
   if (strcmp(cmdcheck,"CMD")!=0) {
     LOG(WARNING) << "bogus message on control interface";
     return;