переведен функционал keep alive на сетевой модуль

core/src/main/java/mc/core/embedded/FakePlayerManager.java

@@ -16,9 +16,6 @@ import java.util.Optional;
 
 public class FakePlayerManager implements PlayerManager {
     public static class FakeNetChannet implements NetChannel {
-        @Override
-        public void sendKeepAlive() {
-        }
 
         @Override
         public void sendTimeUpdate(long time, long age) {

core/src/main/java/mc/core/network/BroadcastNetChannel.java

@@ -16,11 +16,6 @@ import java.util.stream.Stream;
 public class BroadcastNetChannel implements NetChannel {
     private final Stream<Player> playerStream;
 
-    @Override
-    public void sendKeepAlive() {
-        playerStream.forEach(player -> player.getChannel().sendKeepAlive());
-    }
-
     @Override
     public void sendTimeUpdate(final long time, final long age) {
         playerStream.forEach(player -> player.getChannel().sendTimeUpdate(time, age));

core/src/main/java/mc/core/network/NetChannel.java

@@ -9,7 +9,6 @@ import mc.core.text.Text;
 import mc.core.text.Title;
 
 public interface NetChannel {
-    void sendKeepAlive();
     void sendTimeUpdate(long time, long age);
     default void sendChatMessage(Text text) {
         sendChatMessage(text, MessageType.CHAT_MESSAGE);