media: atomisp: get rid of a left-over wrapper function

The abstraction layer for kvfree() was removed, but there
is still a left-over code there.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/sh_css.c

@@ -1863,14 +1863,6 @@ ia_css_enable_isys_event_queue(bool enable) {
 	return 0;
 }
 
-void sh_css_free(void *ptr)
-{
-	if (is_vmalloc_addr(ptr))
-		vfree(ptr);
-	else
-		kfree(ptr);
-}
-
 /* For Acceleration API: Flush FW (shared buffer pointer) arguments */
 void
 sh_css_flush(struct ia_css_acc_fw *fw)