ASoC: q6dsp: Remove unused declaration

Commit 5477518b ("ASoC: qdsp6: audioreach: add q6apm support")
declared but never implemented these.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230811100130.36664-1-yuehaibing@huawei.com


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