Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/files/CS/7zip/Common/CRC.cs

Index: third_party/lzma/v4_65/files/CS/7zip/Common/CRC.cs
diff --git a/third_party/lzma/v4_65/files/CS/7zip/Common/CRC.cs b/third_party/lzma/v4_65/files/CS/7zip/Common/CRC.cs
deleted file mode 100644
index 82cc857ef9e7534b845c787cecff63880287efad..0000000000000000000000000000000000000000
--- a/third_party/lzma/v4_65/files/CS/7zip/Common/CRC.cs
+++ /dev/null
@@ -1,55 +0,0 @@
-// Common/CRC.cs
-
-namespace SevenZip
-{
-	class CRC
-	{
-		public static readonly uint[] Table;
-
-		static CRC()
-		{
-			Table = new uint[256];
-			const uint kPoly = 0xEDB88320;
-			for (uint i = 0; i < 256; i++)
-			{
-				uint r = i;
-				for (int j = 0; j < 8; j++)
-					if ((r & 1) != 0)
-						r = (r >> 1) ^ kPoly;
-					else
-						r >>= 1;
-				Table[i] = r;
-			}
-		}
-
-		uint _value = 0xFFFFFFFF;
-
-		public void Init() { _value = 0xFFFFFFFF; }
-
-		public void UpdateByte(byte b)
-		{
-			_value = Table[(((byte)(_value)) ^ b)] ^ (_value >> 8);
-		}
-
-		public void Update(byte[] data, uint offset, uint size)
-		{
-			for (uint i = 0; i < size; i++)
-				_value = Table[(((byte)(_value)) ^ data[offset + i])] ^ (_value >> 8);
-		}
-
-		public uint GetDigest() { return _value ^ 0xFFFFFFFF; }
-
-		static uint CalculateDigest(byte[] data, uint offset, uint size)
-		{
-			CRC crc = new CRC();
-			// crc.Init();
-			crc.Update(data, offset, size);
-			return crc.GetDigest();
-		}
-
-		static bool VerifyDigest(uint digest, byte[] data, uint offset, uint size)
-		{
-			return (CalculateDigest(data, offset, size) == digest);
-		}
-	}
-}