chore(spotless): clean up imports

Author: gabizou

generator/src/main/java/org/spongepowered/vanilla/generator/GeneratorMain.java

@@ -43,7 +43,6 @@
 import net.minecraft.server.packs.resources.MultiPackResourceManager;
 import net.minecraft.server.permissions.LevelBasedPermissionSet;
 import net.minecraft.tags.TagLoader;
-import net.minecraft.util.Util;
 import net.minecraft.world.level.WorldDataConfiguration;
 import org.spongepowered.vanilla.generator.item.ItemRegistries;
 import org.spongepowered.vanilla.generator.world.TagRegistries;