diff --git a/src/pocketmine/world/format/io/ChunkUtils.php b/src/pocketmine/world/format/io/ChunkUtils.php
index 2eb0d2ff1..27cd2b75e 100644
--- a/src/pocketmine/world/format/io/ChunkUtils.php
+++ b/src/pocketmine/world/format/io/ChunkUtils.php
@@ -24,90 +24,23 @@ declare(strict_types=1);
 namespace pocketmine\world\format\io;
 
 use function chr;
-use function extension_loaded;
-use function ord;
 use function str_repeat;
 
-if(!extension_loaded('pocketmine_chunkutils')){
-	class ChunkUtils{
+class ChunkUtils{
 
-		/**
-		 * Re-orders a byte array (YZX -> XZY and vice versa)
-		 *
-		 * @param string $array length 4096
-		 *
-		 * @return string length 4096
-		 */
-		final public static function reorderByteArray(string $array) : string{
-			$result = str_repeat("\x00", 4096);
-			if($array !== $result){
-				$i = 0;
-				for($x = 0; $x < 16; ++$x){
-					$zM = $x + 256;
-					for($z = $x; $z < $zM; $z += 16){
-						$yM = $z + 4096;
-						for($y = $z; $y < $yM; $y += 256){
-							$result{$i} = $array{$y};
-							++$i;
-						}
-					}
-				}
-			}
-
-			return $result;
+	/**
+	 * Converts pre-MCPE-1.0 biome color array to biome ID array.
+	 *
+	 * @param int[] $array of biome color values
+	 *
+	 * @return string
+	 */
+	public static function convertBiomeColors(array $array) : string{
+		$result = str_repeat("\x00", 256);
+		foreach($array as $i => $color){
+			$result{$i} = chr(($color >> 24) & 0xff);
 		}
-
-		/**
-		 * Re-orders a nibble array (YZX -> XZY and vice versa)
-		 *
-		 * @param string $array length 2048
-		 * @param string $commonValue length 1 common value to fill the default array with and to expect, may improve sort time
-		 *
-		 * @return string length 2048
-		 */
-		final public static function reorderNibbleArray(string $array, string $commonValue = "\x00") : string{
-			$result = str_repeat($commonValue, 2048);
-
-			if($array !== $result){
-				$i = 0;
-				for($x = 0; $x < 8; ++$x){
-					for($z = 0; $z < 16; ++$z){
-						$zx = (($z << 3) | $x);
-						for($y = 0; $y < 8; ++$y){
-							$j = (($y << 8) | $zx);
-							$j80 = ($j | 0x80);
-							if($array{$j} === $commonValue and $array{$j80} === $commonValue){
-								//values are already filled
-							}else{
-								$i1 = ord($array{$j});
-								$i2 = ord($array{$j80});
-								$result{$i}        = chr(($i2 << 4) | ($i1 & 0x0f));
-								$result{$i | 0x80} = chr(($i1 >> 4) | ($i2 & 0xf0));
-							}
-							$i++;
-						}
-					}
-					$i += 128;
-				}
-			}
-
-			return $result;
-		}
-
-		/**
-		 * Converts pre-MCPE-1.0 biome color array to biome ID array.
-		 *
-		 * @param int[] $array of biome color values
-		 *
-		 * @return string
-		 */
-		public static function convertBiomeColors(array $array) : string{
-			$result = str_repeat("\x00", 256);
-			foreach($array as $i => $color){
-				$result{$i} = chr(($color >> 24) & 0xff);
-			}
-			return $result;
-		}
-
+		return $result;
 	}
+
 }