blkdebug: Drop blkdebug_aiocb_info.cancel

Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

block/blkdebug.c

@@ -52,11 +52,8 @@ typedef struct BlkdebugSuspendedReq {
     QLIST_ENTRY(BlkdebugSuspendedReq) next;
 } BlkdebugSuspendedReq;
 
-static void blkdebug_aio_cancel(BlockDriverAIOCB *blockacb);
-
 static const AIOCBInfo blkdebug_aiocb_info = {
-    .aiocb_size = sizeof(BlkdebugAIOCB),
-    .cancel     = blkdebug_aio_cancel,
+    .aiocb_size    = sizeof(BlkdebugAIOCB),
 };
 
 enum {
@@ -450,16 +447,6 @@ static void error_callback_bh(void *opaque)
     qemu_aio_release(acb);
 }
 
-static void blkdebug_aio_cancel(BlockDriverAIOCB *blockacb)
-{
-    BlkdebugAIOCB *acb = container_of(blockacb, BlkdebugAIOCB, common);
-    if (acb->bh) {
-        qemu_bh_delete(acb->bh);
-        acb->bh = NULL;
-    }
-    qemu_aio_release(acb);
-}
-
 static BlockDriverAIOCB *inject_error(BlockDriverState *bs,
     BlockDriverCompletionFunc *cb, void *opaque, BlkdebugRule *rule)
 {