Remove unused import

Author: Doc94

paper-server/src/main/java/org/bukkit/craftbukkit/CraftWorld.java

@@ -73,7 +73,6 @@
 import net.minecraft.world.level.chunk.LevelChunk;
 import net.minecraft.world.level.chunk.status.ChunkStatus;
 import net.minecraft.world.level.gamerules.GameRule;
-import net.minecraft.world.level.gamerules.GameRules;
 import net.minecraft.world.level.levelgen.structure.StructureStart;
 import net.minecraft.world.level.storage.LevelData;
 import net.minecraft.world.level.storage.LevelResource;