diff --git a/src/entity/object/ExperienceOrb.php b/src/entity/object/ExperienceOrb.php
index 3ae1888b3..69f47eb60 100644
--- a/src/entity/object/ExperienceOrb.php
+++ b/src/entity/object/ExperienceOrb.php
@@ -31,7 +31,6 @@ use pocketmine\nbt\tag\ShortTag;
 use pocketmine\network\mcpe\protocol\types\entity\EntityLegacyIds;
 use pocketmine\network\mcpe\protocol\types\entity\EntityMetadataProperties;
 use pocketmine\player\Player;
-use function realpath;
 use function sqrt;
 
 class ExperienceOrb extends Entity{
diff --git a/src/world/format/BiomeArray.php b/src/world/format/BiomeArray.php
index 4e0734611..f2e07d0d2 100644
--- a/src/world/format/BiomeArray.php
+++ b/src/world/format/BiomeArray.php
@@ -23,6 +23,8 @@ declare(strict_types=1);
 
 namespace pocketmine\world\format;
 
+use function chr;
+use function ord;
 use function strlen;
 
 final class BiomeArray{
diff --git a/src/world/format/Chunk.php b/src/world/format/Chunk.php
index 9e02c6ea0..517e4170b 100644
--- a/src/world/format/Chunk.php
+++ b/src/world/format/Chunk.php
@@ -39,12 +39,8 @@ use pocketmine\world\World;
 use function array_fill;
 use function array_filter;
 use function array_map;
-use function assert;
-use function chr;
 use function count;
-use function ord;
 use function str_repeat;
-use function strlen;
 
 class Chunk{
 	public const DIRTY_FLAG_TERRAIN = 1 << 0;