staging: android: ion: Remove leftover comment

Since we use CMA APIs directly there is no device nor private heaps data,
drop this comment.

Fixes: 204f6722 ("staging: android: ion: Use CMA APIs directly")
Signed-off-by: NAndrew F. Davis <afd@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/ion_cma_heap.c

@@ -111,10 +111,6 @@ static struct ion_heap *__ion_cma_heap_create(struct cma *cma)
 		return ERR_PTR(-ENOMEM);
 
 	cma_heap->heap.ops = &ion_cma_ops;
-	/*
-	 * get device from private heaps data, later it will be
-	 * used to make the link with reserved CMA memory
-	 */
 	cma_heap->cma = cma;
 	cma_heap->heap.type = ION_HEAP_TYPE_DMA;
 	return &cma_heap->heap;