Revert "fast sine function"

This reverts commit 3630d9b.

A new class is needed.

Author: Vivian Stewart

src/AudioEffects/SoundGenerator.h

@@ -5,12 +5,7 @@
 #include "AudioBasic/Collections.h"
 
 namespace audio_tools {
-// sine approximation.
-float sine(float t) {
-  float p = (t - (int)t) - 0.5f; // 0 <= p <= 1
-  float pp = p * p;
-  return (p - 6.283211f * pp * p + 9.132843f * pp * pp * p) * -6.221086f;
-}
+
 /**
  * @brief Base class to define the abstract interface for the sound generating classes
  * @author Phil Schatzmann