trx_toolkit: get rid of Python2 specific workarounds

Change-Id: I16c63205c9133d964048588c25867ac7c310f951

src/target/trx_toolkit/data_dump.py

@@ -83,8 +83,6 @@ class DATADumpFile(DATADump):
 			self.f = capture
 
 	def __del__(self):
-		# FIXME: this causes an Exception in Python 2 (but not in Python 3)
-		# AttributeError: 'NoneType' object has no attribute 'info'
 		log.info("Closing the capture file")
 		self.f.close()
 

src/target/trx_toolkit/transceiver.py

@@ -326,8 +326,7 @@ class Transceiver:
 
 	def tx_queue_clear(self):
 		with self._tx_queue_lock:
-			# TODO: Python3: self._tx_queue.clear()
-			del self._tx_queue[:]
+			self._tx_queue.clear()
 
 	def clck_tick(self, fwd, fn):
 		if not self.running: