Remove redundancies of multiply() in FFTFrame.

Source/platform/audio/mac/FFTFrameMac.cpp

Index: Source/platform/audio/mac/FFTFrameMac.cpp
diff --git a/Source/platform/audio/mac/FFTFrameMac.cpp b/Source/platform/audio/mac/FFTFrameMac.cpp
index 54b39bd33ace172d42cbe1f0e8926111330514dc..8ef39402a37cff9b7e8c605416965d53122c80dc 100644
--- a/Source/platform/audio/mac/FFTFrameMac.cpp
+++ b/Source/platform/audio/mac/FFTFrameMac.cpp
@@ -98,28 +98,6 @@ FFTFrame::~FFTFrame()
 {
 }
 
-void FFTFrame::multiply(const FFTFrame& frame)
-{
-    FFTFrame& frame1 = *this;
-    const FFTFrame& frame2 = frame;
-
-    float* realP1 = frame1.realData();
-    float* imagP1 = frame1.imagData();
-    const float* realP2 = frame2.realData();
-    const float* imagP2 = frame2.imagData();
-
-    unsigned halfSize = m_FFTSize / 2;
-    float real0 = realP1[0];
-    float imag0 = imagP1[0];
-
-    // Complex multiply
-    VectorMath::zvmul(realP1, imagP1, realP2, imagP2, realP1, imagP1, halfSize);
-
-    // Multiply the packed DC/nyquist component
-    realP1[0] = real0 * realP2[0];
-    imagP1[0] = imag0 * imagP2[0];
-}
-
 void FFTFrame::doFFT(const float* data)
 {
     AudioFloatArray scaledData(m_FFTSize);