block: remove THROTL_IOPS_MAX

No one uses THROTL_IOPS_MAX any more, so remove it.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220211101149.2368042-2-ming.lei@redhat.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

include/linux/blk-cgroup.h

@@ -28,8 +28,6 @@
 /* percpu_counter batch for blkg_[rw]stats, per-cpu drift doesn't matter */
 #define BLKG_STAT_CPU_BATCH	(INT_MAX / 2)
 
-/* Max limits for throttle policy */
-#define THROTL_IOPS_MAX		UINT_MAX
 #define FC_APPID_LEN              129