ac3enc: remove empty ac3_float function that is never called

libavcodec/ac3enc.c

@@ -2363,7 +2363,6 @@ av_cold int ff_ac3_encode_init(AVCodecContext *avctx)
         s->mdct_end                     = ff_ac3_float_mdct_end;
         s->mdct_init                    = ff_ac3_float_mdct_init;
         s->apply_window                 = ff_ac3_float_apply_window;
-        s->normalize_samples            = ff_ac3_float_normalize_samples;
         s->scale_coefficients           = ff_ac3_float_scale_coefficients;
         s->deinterleave_input_samples   = ff_ac3_float_deinterleave_input_samples;
         s->apply_mdct                   = ff_ac3_float_apply_mdct;

libavcodec/ac3enc.h

@@ -269,7 +269,6 @@ void ff_ac3_float_apply_window(DSPContext *dsp, SampleType *output,
                                const SampleType *window, unsigned int len);
 
 int ff_ac3_fixed_normalize_samples(AC3EncodeContext *s);
-int ff_ac3_float_normalize_samples(AC3EncodeContext *s);
 
 void ff_ac3_fixed_scale_coefficients(AC3EncodeContext *s);
 void ff_ac3_float_scale_coefficients(AC3EncodeContext *s);

libavcodec/ac3enc_float.c

@@ -90,16 +90,6 @@ void ff_ac3_float_apply_window(DSPContext *dsp, float *output,
 }
 
 
-/**
- * Normalize the input samples to use the maximum available precision.
- */
-int ff_ac3_float_normalize_samples(AC3EncodeContext *s)
-{
-    /* Normalization is not needed for floating-point samples, so just return 0 */
-    return 0;
-}
-
-
 /**
  * Scale MDCT coefficients from float to 24-bit fixed-point.
  */