blkparse: remove duplicated entry for flag M

remove dupliated entry 'M' for man page of blkparse.

Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Weiping Zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed