fs/ntfs3: Remove field sbi->used.bitmap.set_tail

This field is not used in driver.
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>

fs/ntfs3/ntfs_fs.h

@@ -163,7 +163,6 @@ struct wnd_bitmap {
 	size_t zone_bit;
 	size_t zone_end;
 
-	bool set_tail; // Not necessary in driver.
 	bool inited;
 };
 

fs/ntfs3/super.c

@@ -1117,8 +1117,6 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
 		goto put_inode_out;
 	}
 
-	/* Not necessary. */
-	sbi->used.bitmap.set_tail = true;
 	err = wnd_init(&sbi->used.bitmap, sb, tt);
 	if (err)
 		goto put_inode_out;