perf: 优化代码

hamster-core-bukkit/src/main/java/cn/hamster3/mc/plugin/core/bukkit/page/PageElement.java

@@ -1,5 +0,0 @@
-package cn.hamster3.mc.plugin.core.bukkit.page;
-
-@SuppressWarnings("unused")
-public interface PageElement {
-}

hamster-core-bukkit/src/main/java/cn/hamster3/mc/plugin/core/bukkit/page/handler/PageableHandler.java

@@ -2,7 +2,6 @@ package cn.hamster3.mc.plugin.core.bukkit.page.handler;
 
 import cn.hamster3.mc.plugin.core.bukkit.page.ButtonGroup;
 import cn.hamster3.mc.plugin.core.bukkit.page.PageConfig;
-import cn.hamster3.mc.plugin.core.bukkit.page.PageElement;
 import org.bukkit.Material;
 import org.bukkit.entity.HumanEntity;
 import org.bukkit.event.inventory.ClickType;
@@ -24,7 +23,7 @@ import java.util.Map;
  * @param <E> 页面元素
  */
 @SuppressWarnings("unused")
-public abstract class PageableHandler<E extends PageElement> extends FixedPageHandler {
+public abstract class PageableHandler<E> extends FixedPageHandler {
     private static final ItemStack EMPTY_STACK = new ItemStack(Material.AIR);
 
     private String previewButtonName = "preview";

hamster-core-bukkit/src/main/java/cn/hamster3/mc/plugin/core/bukkit/util/BukkitCallbackUtils.java

@@ -8,8 +8,8 @@ import org.bukkit.entity.HumanEntity;
 import java.util.concurrent.CompletableFuture;
 
 @SuppressWarnings("unused")
-public final class CallbackUtils {
-    private CallbackUtils() {
+public final class BukkitCallbackUtils {
+    private BukkitCallbackUtils() {
     }
 
     public static CompletableFuture<String> getPlayerChat(HumanEntity player) {