Merge pull request 'remove unknown trade state' (#14) from trade_unknown into master

Reviewed-on: #14

src/packet/messages.rs

@@ -700,7 +700,6 @@ pub enum TradeRequestCommand {
     RemoveItem(u32, u32),
     Confirm,
     FinalConfirm,
-    Unknown,
 }
 
 impl PSOPacketData for TradeRequestCommand {
@@ -738,9 +737,6 @@ impl PSOPacketData for TradeRequestCommand {
             4 => {
                 Ok(TradeRequestCommand::FinalConfirm)
             },
-            6 => {
-                Ok(TradeRequestCommand::Unknown)
-            },
             _ => {
                 Err(PacketParseError::InvalidValue)
             },
@@ -788,12 +784,6 @@ impl PSOPacketData for TradeRequestCommand {
                     .chain(std::iter::repeat(0).take(11))
                     .collect()
             },
-            TradeRequestCommand::Unknown => {
-                vec![6u8]
-                    .into_iter()
-                    .chain(std::iter::repeat(0).take(11))
-                    .collect()
-            },
         }
     }
 }