ocfs2: clean up unused local variables in ocfs2_file_write_iter

Since commit 86b9c6f3 ("ocfs2: remove filesize checks for sync I/O
journal commit") removes filesize checks for sync I/O journal commit,
variables old_size and old_clusters are not actually used any more.  So
clean them up.
Signed-off-by: NJoseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/file.c

@@ -2262,8 +2262,6 @@ static ssize_t ocfs2_file_write_iter(struct kiocb *iocb,
 	ssize_t written = 0;
 	ssize_t ret;
 	size_t count = iov_iter_count(from), orig_count;
-	loff_t old_size;
-	u32 old_clusters;
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
@@ -2367,13 +2365,6 @@ static ssize_t ocfs2_file_write_iter(struct kiocb *iocb,
 		ocfs2_iocb_set_unaligned_aio(iocb);
 	}
 
-	/*
-	 * To later detect whether a journal commit for sync writes is
-	 * necessary, we sample i_size, and cluster count here.
-	 */
-	old_size = i_size_read(inode);
-	old_clusters = OCFS2_I(inode)->ip_clusters;
-
 	/* communicate with ocfs2_dio_end_io */
 	ocfs2_iocb_set_rw_locked(iocb, rw_level);