remove obsolete methods

Author: swharden

src/Spectrogram/SpectrogramGenerator.cs

@@ -351,20 +351,6 @@ public Bitmap GetBitmapMax(double intensity = 1, bool dB = false, double dBScale
             return Image.GetBitmap(ffts2, Colormap, intensity, dB, dBScale, roll, NextColumnIndex);
         }
 
-        [Obsolete("The SFF file format is obsolete. " +
-            "Users are encouraged to write their own IO routines specific to their application. " +
-            "To get a copy of the original SFF reader/writer see https://github.com/swharden/Spectrogram/issues/44",
-            error: true)]
-        /// <summary>
-        /// Export spectrogram data using the Spectrogram File Format (SFF)
-        /// </summary>
-        public void SaveData(string filePath, int melBinCount = 0)
-        {
-            if (!filePath.EndsWith(".sff", StringComparison.OrdinalIgnoreCase))
-                filePath += ".sff";
-            new SFF(this, melBinCount).Save(filePath);
-        }
-
         /// <summary>
         /// Defines the total number of FFTs (spectrogram columns) to store in memory. Determines Width.
         /// </summary>