After commit 
a7eeb823854c ("f2fs: use bitmap in discard_entry"),
MAX_DISCARD_BLOCKS became obsolete, remove it.
Signed-off-by: Chao Yu <chao.yu@oppo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
 
 #define CP_PAUSE       0x00000040
 #define CP_RESIZE      0x00000080
 
-#define MAX_DISCARD_BLOCKS(sbi)                BLKS_PER_SEC(sbi)
 #define DEF_MAX_DISCARD_REQUEST                8       /* issue 8 discards per round */
 #define DEF_MIN_DISCARD_ISSUE_TIME     50      /* 50 ms, if exists */
 #define DEF_MID_DISCARD_ISSUE_TIME     500     /* 500 ms, if device busy */