remove unused barrier.h

While looking for things that needs porting for Aarch64,
barrier.h from blktrace was identified. However, a deeper
look shows that this file is not actually used anymore
in blktrace.

Remove unused file to avoid future confusion.

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
1 file changed