Update BukkitCommandManager.java

Author: sh1ry

bukkit/src/main/java/io/github/shiryu/commands/bukkit/BukkitCommandManager.java

@@ -12,7 +12,6 @@
 import io.github.shiryu.commands.bukkit.parameter.PlayerParameterType;
 import io.github.shiryu.commands.bukkit.parameter.UUIDParameterType;
 import io.github.shiryu.commands.bukkit.parameter.WorldParameterType;
-import io.github.shiryu.commands.bukkit.util.ReflectionUtil;
 import lombok.Getter;
 import org.bukkit.Bukkit;
 import org.bukkit.GameMode;