Remove unused decompress methods.

src/ZoneTree/Compression/BrotliDataCompression.cs

@@ -1,5 +1,4 @@
 using System.IO.Compression;
-using ZoneTree.AbstractFileStream;
 
 namespace ZoneTree.Compression;
 
@@ -22,17 +21,6 @@ public static class BrotliDataCompression
     return compressed.AsMemory(0, compressedLength);
   }
 
-  public static byte[] Decompress(Memory<byte> compressedBytes)
-  {
-    using var pin = compressedBytes.Pin();
-    using var msInput = compressedBytes.ToReadOnlyStream(pin);
-    using var msOutput = new MemoryStream();
-    using var gzs = new BrotliStream(msInput, CompressionMode.Decompress);
-    gzs.CopyTo(msOutput);
-    var decompressed = msOutput.ToArray();
-    return decompressed;
-  }
-
   public static byte[] Decompress(Memory<byte> compressedBytes, int decompressedLength)
   {
     var decompressed = new byte[decompressedLength];

src/ZoneTree/Compression/GZipDataCompression.cs

@@ -15,17 +15,6 @@ public static class GZipDataCompression
     return msOutput.ToArray();
   }
 
-  public static byte[] Decompress(Memory<byte> compressedBytes)
-  {
-    using var pin = compressedBytes.Pin();
-    using var msInput = compressedBytes.ToReadOnlyStream(pin);
-    using var msOutput = new MemoryStream(compressedBytes.Length);
-    using var gzs = new GZipStream(msInput, CompressionMode.Decompress);
-    gzs.CopyTo(msOutput);
-    var decompressed = msOutput.ToArray();
-    return decompressed;
-  }
-
   public static byte[] Decompress(Memory<byte> compressedBytes, int decompressedLength)
   {
     var decompressed = new byte[decompressedLength];

src/ZoneTree/Compression/LZ4DataCompression.cs

@@ -9,11 +9,6 @@ public static class LZ4DataCompression
     return LZ4Pickler.Pickle(bytes.Span, (LZ4Level)level);
   }
 
-  public static byte[] Decompress(Memory<byte> compressedBytes)
-  {
-    return LZ4Pickler.Unpickle(compressedBytes.Span);
-  }
-
   public static byte[] Decompress(Memory<byte> compressedBytes, int decompressedLength)
   {
     var bytes = new byte[decompressedLength];
@@ -23,6 +18,6 @@ public static class LZ4DataCompression
 
   public static int GetDecompressedLength(Memory<byte> compressedBytes)
   {
-    return checked((int)LZ4Pickler.UnpickledSize(compressedBytes.Span));
+    return checked(LZ4Pickler.UnpickledSize(compressedBytes.Span));
   }
 }

src/ZoneTree/Compression/ZstdDataCompression.cs

@@ -18,13 +18,6 @@ public static class ZstdDataCompression
     return compressed.AsMemory(0, compressedLength);
   }
 
-  public static byte[] Decompress(Memory<byte> compressedBytes)
-  {
-    var decompressedLength = checked((int)Decompressor
-        .GetDecompressedSize(compressedBytes.Span));
-    return Decompress(compressedBytes, decompressedLength);
-  }
-
   public static byte[] Decompress(Memory<byte> compressedBytes, int decompressedLength)
   {
     var decompressed = new byte[decompressedLength];