ASoC: rsnd: remove all rsnd_xxx_remove()

Now, rsnd_xxx_remove() do nothing.
remove these

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --cc sound/soc/sh/rcar/adg.c
Simple merge

diff --cc sound/soc/sh/rcar/core.c
Simple merge

diff --cc sound/soc/sh/rcar/gen.c
Simple merge

diff --cc sound/soc/sh/rcar/rsnd.h
Simple merge

diff --cc sound/soc/sh/rcar/scu.c
Simple merge

diff --cc sound/soc/sh/rcar/ssi.c
Simple merge