remove redundant SaveInternal

src/ImageSharp/Image/Image{TColor}.cs

@@ -349,9 +349,7 @@ namespace ImageSharp
         /// <returns>The <see cref="Image{TColor}"/></returns>
         public Image<TColor> Save(Stream stream, IEncoderOptions options)
         {
-            Guard.NotNull(stream, nameof(stream));
-            this.SaveInternal(stream, this.CurrentImageFormat?.Encoder, options);
-            return this;
+            return this.Save(stream, this.CurrentImageFormat?.Encoder, options);
         }
 
         /// <summary>
@@ -376,9 +374,7 @@ namespace ImageSharp
         {
             Guard.NotNull(format, nameof(format));
 
-            this.SaveInternal(stream, format.Encoder, options);
-
-            return this;
+            return this.Save(stream, format.Encoder, options);
         }
 
         /// <summary>
@@ -407,7 +403,10 @@ namespace ImageSharp
         /// </returns>
         public Image<TColor> Save(Stream stream, IImageEncoder encoder, IEncoderOptions options)
         {
-            this.SaveInternal(stream, encoder, options);
+            Guard.NotNull(stream, nameof(stream));
+            Guard.NotNull(encoder, nameof(encoder));
+
+            encoder.Encode(this, stream, options);
 
             return this;
         }
@@ -581,22 +580,6 @@ namespace ImageSharp
             base.Dispose(disposing);
         }
 
-        /// <summary>
-        /// Internally saves the image to the given stream using the given image encoder and options.
-        /// Can be used by overridden by tests to verify save opperations.
-        /// </summary>
-        /// <param name="stream">The stream to save the image to.</param>
-        /// <param name="encoder">The encoder to save the image with.</param>
-        /// <param name="options">The options for the encoder.</param>
-        /// <exception cref="System.ArgumentNullException">Thrown if the stream or encoder is null.</exception>
-        private void SaveInternal(Stream stream, IImageEncoder encoder, IEncoderOptions options)
-        {
-            Guard.NotNull(stream, nameof(stream));
-            Guard.NotNull(encoder, nameof(encoder));
-
-            encoder.Encode(this, stream, options);
-        }
-
         /// <summary>
         /// Copies the properties from the other <see cref="IImage"/>.
         /// </summary>