ASoC: Intel: sof_ssp_amp: remove unused variable

The variable becomes useless since we moved the snd_soc_jack
structure from a static array to sof_hdmi_pcm structure.

Signed-off-by: Brent Lu <brent.lu@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230103073704.722027-1-brent.lu@intel.com


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