enum reverse cache objects

src/main/java/net/schmizz/sshj/common/Message.java

@@ -67,7 +67,6 @@ public enum Message {
 
     static {
         for (Message c : Message.values())
-            if (cache[c.toByte()] == null)
             cache[c.toByte()] = c;
     }
 

src/main/java/net/schmizz/sshj/connection/channel/direct/Signal.java

@@ -27,8 +27,7 @@ public enum Signal {
     INT("INT"),
     KILL("KILL"),
     PIPE("PIPE"),
-    QUIT(
-            "QUIT"),
+    QUIT("QUIT"),
     SEGV("SEGV"),
     TERM("TERM"),
     USR1("USR1"),

src/main/java/net/schmizz/sshj/sftp/PacketType.java

@@ -52,7 +52,6 @@ public enum PacketType {
 
     static {
         for (PacketType t : PacketType.values())
-            if (cache[t.toByte() & 0xff] == null)
             cache[t.toByte() & 0xff] = t;
     }