ASoC: Remove some unused defines from WM8903

These would have been used if we'd done manual clock divider setup,
but we didn't.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/codecs/wm8903.h

@@ -19,10 +19,6 @@ extern int wm8903_mic_detect(struct snd_soc_codec *codec,
 			     struct snd_soc_jack *jack,
 			     int det, int shrt);
 
-#define WM8903_MCLK_DIV_2 1
-#define WM8903_CLK_SYS    2
-#define WM8903_BCLK       3
-#define WM8903_LRCLK      4
 
 /*
  * Register values.