ALSA: asihpi: Remove unused variable

the variable is never referenced in the code, just remove it.

Signed-off-by: Zhu Jun <zhujun2@cmss.chinamobile.com>
Link: https://patch.msgid.link/20241126093245.3228-1-zhujun2@cmss.chinamobile.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>