remove unnecessary command parameter

src/main/java/carpet/mixins/ClientPacketListener_customPacketsMixin.java

@@ -36,7 +36,7 @@ public abstract class ClientPacketListener_customPacketsMixin extends ClientComm
     {
         if (packet instanceof CarpetClient.CarpetPayload cpp)
         {
-            ClientNetworkHandler.handleData(cpp, minecraft.player);
+            ClientNetworkHandler.onServerData(cpp.data(), minecraft.player);
             ci.cancel();
         }
     }

src/main/java/carpet/mixins/ServerCommonPacketListenerimpl_connectionMixin.java

@@ -24,7 +24,7 @@ public class ServerCommonPacketListenerimpl_connectionMixin
             // ServerNetworkHandler.handleData can possibly mutate data that isn't
             // thread safe, and also allows for client commands to be executed
             PacketUtils.ensureRunningOnSameThread(serverboundCustomPayloadPacket, (ServerGamePacketListener) this, impl.player.serverLevel());
-            ServerNetworkHandler.handleData(cpp, impl.player);
+            ServerNetworkHandler.onClientData(impl.player, cpp.data());
             ci.cancel();
         }
     }