Minor style cleanup.

src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeKernel.cs

@@ -61,9 +61,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// <returns>The weighted sum</returns>
         [MethodImpl(InliningOptions.ShortMethod)]
         public Vector4 Convolve(Span<Vector4> rowSpan)
-        {
-            return this.ConvolveCore(ref rowSpan[this.StartIndex]);
-        }
+            => this.ConvolveCore(ref rowSpan[this.StartIndex]);
 
         [MethodImpl(InliningOptions.ShortMethod)]
         public Vector4 ConvolveCore(ref Vector4 rowStartRef)
@@ -91,9 +89,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
         /// </summary>
         [MethodImpl(InliningOptions.ShortMethod)]
         internal ResizeKernel AlterLeftValue(int left)
-        {
-            return new ResizeKernel(left, this.bufferPtr, this.Length);
-        }
+            => new ResizeKernel(left, this.bufferPtr, this.Length);
 
         internal void Fill(Span<double> values)
         {

src/ImageSharp/Processing/Processors/Transforms/Resize/ResizeWorker.cs

@@ -105,14 +105,10 @@ namespace SixLabors.ImageSharp.Processing.Processors.Transforms
 
         [MethodImpl(InliningOptions.ShortMethod)]
         public Span<Vector4> GetColumnSpan(int x, int startY)
-        {
-            return this.transposedFirstPassBuffer.GetRowSpan(x).Slice(startY - this.currentWindow.Min);
-        }
+            => this.transposedFirstPassBuffer.GetRowSpan(x).Slice(startY - this.currentWindow.Min);
 
         public void Initialize()
-        {
-            this.CalculateFirstPassValues(this.currentWindow);
-        }
+            => this.CalculateFirstPassValues(this.currentWindow);
 
         public void FillDestinationPixels(RowInterval rowInterval, Buffer2D<TPixel> destination)
         {