ntfs: remove references to long gone super operations and unimplemented methods

->delete_inode(), ->write_super_lockfs(), ->unlockfs() are gone so remove
refereces to them in the NTFS code.  Remove unnecessary comments about
unimplemented methods while at it (suggested by Christoph Hellwig).

Noticed while cleaning up the fsfreeze mess.
Signed-off-by: NFernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Cc: Anton Altaparmakov <anton@tuxera.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/ntfs/super.c

@@ -2660,31 +2660,14 @@ static const struct super_operations ntfs_sops = {
 	.alloc_inode	= ntfs_alloc_big_inode,	  /* VFS: Allocate new inode. */
 	.destroy_inode	= ntfs_destroy_big_inode, /* VFS: Deallocate inode. */
 #ifdef NTFS_RW
-	//.dirty_inode	= NULL,			/* VFS: Called from
-	//					   __mark_inode_dirty(). */
 	.write_inode	= ntfs_write_inode,	/* VFS: Write dirty inode to
 						   disk. */
-	//.drop_inode	= NULL,			/* VFS: Called just after the
-	//					   inode reference count has
-	//					   been decreased to zero.
-	//					   NOTE: The inode lock is
-	//					   held. See fs/inode.c::
-	//					   generic_drop_inode(). */
-	//.delete_inode	= NULL,			/* VFS: Delete inode from disk.
-	//					   Called when i_count becomes
-	//					   0 and i_nlink is also 0. */
-	//.write_super	= NULL,			/* Flush dirty super block to
-	//					   disk. */
-	//.sync_fs	= NULL,			/* ? */
-	//.write_super_lockfs	= NULL,		/* ? */
-	//.unlockfs	= NULL,			/* ? */
 #endif /* NTFS_RW */
 	.put_super	= ntfs_put_super,	/* Syscall: umount. */
 	.statfs		= ntfs_statfs,		/* Syscall: statfs */
 	.remount_fs	= ntfs_remount,		/* Syscall: mount -o remount. */
 	.evict_inode	= ntfs_evict_big_inode,	/* VFS: Called when an inode is
 						   removed from memory. */
-	//.umount_begin	= NULL,			/* Forced umount. */
 	.show_options	= ntfs_show_options,	/* Show mount options in
 						   proc. */
 };