ASoC: mediatek: mt2701: drop unnessary snd_soc_unregister_component()

It's not necessary to unregister a component registered
with devm_snd_soc_register_component().

Fixes: f1b5bf07 ("ASoC: mt2701/mt8173: replace platform to componen")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>