[PATCH -next] block: remove set but not used variable 'et'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

block/blk-ioc.c: In function 'put_io_context_active':
block/blk-ioc.c:174:24: warning:
 variable 'et' set but not used [-Wunused-but-set-variable]

It not used any more after commit
a1ce35fa4985 ("block: remove dead elevator code")

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 block/blk-ioc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 007aac6..56755ad 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -171,7 +171,6 @@ void put_io_context(struct io_context *ioc)
  */
 void put_io_context_active(struct io_context *ioc)
 {
-       struct elevator_type *et;
        unsigned long flags;
        struct io_cq *icq;
 
@@ -190,7 +189,6 @@ void put_io_context_active(struct io_context *ioc)
                if (icq->flags & ICQ_EXITED)
                        continue;
 
-               et = icq->q->elevator->type;
                ioc_exit_icq(icq);
        }
        spin_unlock_irqrestore(&ioc->lock, flags);