io_uring: Remove unused function

The function are defined in the io_uring.c file, but not called
elsewhere, so delete the unused function.

io_uring/io_uring.c:646:20: warning: unused function '__io_cq_unlock'.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=8660Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240328022324.78029-1-jiapeng.chong@linux.alibaba.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/io_uring.c

@@ -643,12 +643,6 @@ static inline void __io_cq_lock(struct io_ring_ctx *ctx)
 		spin_lock(&ctx->completion_lock);
 }
 
-static inline void __io_cq_unlock(struct io_ring_ctx *ctx)
-{
-	if (!ctx->lockless_cq)
-		spin_unlock(&ctx->completion_lock);
-}
-
 static inline void io_cq_lock(struct io_ring_ctx *ctx)
 	__acquires(ctx->completion_lock)
 {