[PORT FROM R2] atomisp: remove useless assignment in ->remove()

[PORT FROM R2] atomisp: remove useless assignment in ->remove()

BZ: 17272

There is no need to do assignment in structure that will be freed anyway.

Change-Id: I92a5a4b2442995537790664732b1891339ed4ba9
Orig-Change-Id: I93430f6d8b8bfd7fdcf5fb47da74729d26733e67
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: David Cohen <david.a.cohen@intel.com>
Reviewed-on: http://android.intel.com:8080/25441
Reviewed-by: Cohen, David A <david.a.cohen@intel.com>
Reviewed-by: Wang, Wen W <wen.w.wang@intel.com>
Reviewed-by: Koskinen, Ilkka <ilkka.koskinen@intel.com>
Reviewed-by: Kruger, Jozef <jozef.kruger@intel.com>
Tested-by: Koski, Anttu <anttu.koski@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
Reviewed-on: http://android.intel.com:8080/28032
Reviewed-by: Tuominen, TeemuX <teemux.tuominen@intel.com>
Reviewed-by: Koski, Anttu <anttu.koski@intel.com>