ASoC: audio-graph-card2-custom-sample.dtsi: remove original sample

audio-graph-card2-custom-sample has many sample connections, but because
ALSA card has number limition for links, it is impossible to have all
samples into 1 ASoC card.

The sample is separated into 2 samples. Remove original sample.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87tt8s9hpp.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>