suppress console output when loading SFF files

solves #15

Author: swharden

src/Spectrogram/SFF.cs

@@ -76,7 +76,6 @@ public void Load(string filePath)
  // read file version
  byte versionMajor = bytes[40];
  byte versionMinor = bytes[41];
- Console.WriteLine($"SFF version {versionMajor}.{versionMinor}");
 
  // read time information
  SampleRate = BitConverter.ToInt32(bytes, 42);