f2fs: cleanup the code in build_sit_entries.

We do not need to set the SBI_NEED_FSCK flag in the error paths, if we
return error here, we will not update the checkpoint flag, so the code
is useless, just remove it.
Signed-off-by: Lihong Kou <koulihong@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/segment.c

@@ -4168,7 +4168,6 @@ static int build_sit_entries(struct f2fs_sb_info *sbi)
 		if (start >= MAIN_SEGS(sbi)) {
 			f2fs_err(sbi, "Wrong journal entry on segno %u",
 				 start);
-			set_sbi_flag(sbi, SBI_NEED_FSCK);
 			err = -EFSCORRUPTED;
 			break;
 		}
@@ -4208,7 +4207,6 @@ static int build_sit_entries(struct f2fs_sb_info *sbi)
 	if (!err && total_node_blocks != valid_node_count(sbi)) {
 		f2fs_err(sbi, "SIT is corrupted node# %u vs %u",
 			 total_node_blocks, valid_node_count(sbi));
-		set_sbi_flag(sbi, SBI_NEED_FSCK);
 		err = -EFSCORRUPTED;
 	}