ASoC: rsnd: remove mismatch explain comment from src.c

Before, src.c cares SRC and SSIU, but now SSIU is cared by ssiu.c by
commit c7f69ab5364d ("ASoC: rsnd: use mod base common method on SSIU").
This patch removes mismatched explanation for SRC/SSIU from src.c

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

sound/soc/sh/rcar/src.c

@@ -51,20 +51,6 @@ struct rsnd_src {
  *
  */
 
-/*
- * src.c is caring...
- *
- * Gen1
- *
- * [mem] -> [SRU] -> [SSI]
- *        |--------|
- *
- * Gen2
- *
- * [mem] -> [SRC] -> [SSIU] -> [SSI]
- *        |-----------------|
- */
-
 static void rsnd_src_activation(struct rsnd_mod *mod)
 {
 	rsnd_mod_write(mod, SRC_SWRSR, 0);