nilfs2: remove nilfs_dat_abort_start and nilfs_dat_abort_free

These functions are not called from any functions.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

fs/nilfs2/dat.c

@@ -109,12 +109,6 @@ void nilfs_dat_commit_free(struct inode *dat, struct nilfs_palloc_req *req)
 	nilfs_palloc_commit_free_entry(dat, req);
 }
 
-void nilfs_dat_abort_free(struct inode *dat, struct nilfs_palloc_req *req)
-{
-	nilfs_dat_abort_entry(dat, req);
-	nilfs_palloc_abort_free_entry(dat, req);
-}
-
 int nilfs_dat_prepare_start(struct inode *dat, struct nilfs_palloc_req *req)
 {
 	int ret;
@@ -140,11 +134,6 @@ void nilfs_dat_commit_start(struct inode *dat, struct nilfs_palloc_req *req,
 	nilfs_dat_commit_entry(dat, req);
 }
 
-void nilfs_dat_abort_start(struct inode *dat, struct nilfs_palloc_req *req)
-{
-	nilfs_dat_abort_entry(dat, req);
-}
-
 int nilfs_dat_prepare_end(struct inode *dat, struct nilfs_palloc_req *req)
 {
 	struct nilfs_dat_entry *entry;

fs/nilfs2/dat.h

@@ -39,7 +39,6 @@ void nilfs_dat_abort_alloc(struct inode *, struct nilfs_palloc_req *);
 int nilfs_dat_prepare_start(struct inode *, struct nilfs_palloc_req *);
 void nilfs_dat_commit_start(struct inode *, struct nilfs_palloc_req *,
 			    sector_t);
-void nilfs_dat_abort_start(struct inode *, struct nilfs_palloc_req *);
 int nilfs_dat_prepare_end(struct inode *, struct nilfs_palloc_req *);
 void nilfs_dat_commit_end(struct inode *, struct nilfs_palloc_req *, int);
 void nilfs_dat_abort_end(struct inode *, struct nilfs_palloc_req *);