refactor: import optimize

Author: toxicity188

api/src/main/java/kr/toxicity/model/api/manager/SkinManager.java

@@ -3,9 +3,7 @@
 import com.mojang.authlib.GameProfile;
 import kr.toxicity.model.api.player.PlayerSkinProvider;
 import kr.toxicity.model.api.skin.SkinData;
-import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 
 public interface SkinManager extends GlobalManager {
     boolean supported();