Revert "Added PacketType ContentionFreePeriod"

This reverts commit 333a514363.

src/dto/Packet.js

@@ -9,7 +9,6 @@ const PacketType = {
     Acknowledgment: 'Acknowledgment',
     BlockAcknowledgment: 'BlockAcknowledgment',
     NoData: 'NoData',
-    ContentionFreePeriod: 'ContentionFreePeriod',
     Unknown: 'Unknown'
 }
 

src/streamHandler/PacketStreamFactory.js

@@ -12,8 +12,7 @@ const PACKET_TYPE_MAP = {
     "Request-To-Send":  PacketType.RequestToSend,
     "Clear-To-Send":    PacketType.ClearToSend,
     "Acknowledgment":   PacketType.Acknowledgment,
-    "BA":               PacketType.BlockAcknowledgment,
-    "CD":               PacketType.ContentionFreePeriod
+    "BA":               PacketType.BlockAcknowledgment
 };
 const PACKET_TYPES_REGEX = Object.keys(PACKET_TYPE_MAP).join('|');