Remove TiffUtils, use Stream extensions instead

src/ImageSharp/Formats/Tiff/Compression/DeflateTiffCompression.cs

@@ -60,7 +60,7 @@ namespace SixLabors.ImageSharp.Formats.Experimental.Tiff.Compression
             var subStream = new SubStream(stream, byteCount - headerLength);
             using (var deflateStream = new DeflateStream(subStream, CompressionMode.Decompress, true))
             {
-                deflateStream.ReadFull(buffer);
+                deflateStream.Read(buffer, 0, buffer.Length);
             }
 
             if (this.Predictor == TiffPredictor.Horizontal)

src/ImageSharp/Formats/Tiff/Compression/NoneTiffCompression.cs

@@ -26,7 +26,7 @@ namespace SixLabors.ImageSharp.Formats.Experimental.Tiff.Compression
         /// <inheritdoc/>
         public override void Decompress(Stream stream, int byteCount, Span<byte> buffer)
         {
-            stream.ReadFull(buffer, byteCount);
+            stream.Read(buffer, 0, byteCount);
         }
     }
 }

src/ImageSharp/Formats/Tiff/Compression/PackBitsTiffCompression.cs

@@ -31,7 +31,7 @@ namespace SixLabors.ImageSharp.Formats.Experimental.Tiff.Compression
 
             Span<byte> compressedData = compressedDataMemory.GetSpan();
 
-            stream.ReadFull(compressedData, byteCount);
+            stream.Read(compressedData, 0, byteCount);
             int compressedOffset = 0;
             int decompressedOffset = 0;
 

src/ImageSharp/Formats/Tiff/Compression/T4BitReader.cs

@@ -821,7 +821,7 @@ namespace SixLabors.ImageSharp.Formats.Experimental.Tiff.Compression
         private void ReadImageDataFromStream(Stream input, int bytesToRead)
         {
             Span<byte> dataSpan = this.Data.GetSpan();
-            input.ReadFull(dataSpan, bytesToRead);
+            input.Read(dataSpan, 0, bytesToRead);
         }
     }
 }

src/ImageSharp/Formats/Tiff/Utils/TiffUtils.cs

@@ -1,54 +0,0 @@
-// Copyright (c) Six Labors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-using System.IO;
-
-namespace SixLabors.ImageSharp.Formats.Experimental.Tiff.Utils
-{
-    /// <summary>
-    /// TIFF specific utilities and extension methods.
-    /// </summary>
-    internal static class TiffUtils
-    {
-        /// <summary>
-        /// Reads a sequence of bytes from the input stream into a buffer.
-        /// </summary>
-        /// <param name="stream">The stream to read from.</param>
-        /// <param name="buffer">A buffer to store the retrieved data.</param>
-        /// <param name="count">The number of bytes to read.</param>
-        public static void ReadFull(this Stream stream, Span<byte> buffer, int count)
-        {
-            int offset = 0;
-
-            while (count > 0)
-            {
-                int bytesLeftInBuffer = buffer.Length - offset;
-                if (bytesLeftInBuffer < count)
-                {
-                    TiffThrowHelper.ThrowImageFormatException("Error reading data from the stream. The provided buffer was too small.");
-                }
-
-                int bytesRead = stream.Read(buffer, offset, count);
-
-                if (bytesRead == 0)
-                {
-                    break;
-                }
-
-                offset += bytesRead;
-                count -= bytesRead;
-            }
-        }
-
-        /// <summary>
-        /// Reads all bytes from the input stream into a buffer until the end of stream or the buffer is full.
-        /// </summary>
-        /// <param name="stream">The stream to read from.</param>
-        /// <param name="buffer">A buffer to store the retrieved data.</param>
-        public static void ReadFull(this Stream stream, Span<byte> buffer)
-        {
-            ReadFull(stream, buffer, buffer.Length);
-        }
-    }
-}