[XFS] remove bogus struct dirent forward declarations

SGI Modid: 2.5.x-xfs:slinx:133428a

fs/xfs/xfs_dir2.h

@@ -32,7 +32,6 @@
 #ifndef __XFS_DIR2_H__
 #define __XFS_DIR2_H__
 
-struct dirent;
 struct uio;
 struct xfs_dabuf;
 struct xfs_da_args;

fs/xfs/xfs_dir2_block.h

@@ -37,7 +37,6 @@
  * Directory version 2, single block format structures
  */
 
-struct dirent;
 struct uio;
 struct xfs_dabuf;
 struct xfs_da_args;

fs/xfs/xfs_dir2_leaf.h

@@ -36,7 +36,6 @@
  * Directory version 2, leaf block structures.
  */
 
-struct dirent;
 struct uio;
 struct xfs_dabuf;
 struct xfs_da_args;

fs/xfs/xfs_dir2_node.h

@@ -36,7 +36,6 @@
  * Directory version 2, btree node format structures
  */
 
-struct dirent;
 struct uio;
 struct xfs_dabuf;
 struct xfs_da_args;

fs/xfs/xfs_dir2_sf.h

@@ -39,7 +39,6 @@
  * fit into the literal area of the inode.
  */
 
-struct dirent;
 struct uio;
 struct xfs_dabuf;
 struct xfs_da_args;

fs/xfs/xfs_dir_leaf.h

@@ -42,7 +42,6 @@
  * internal links in the Btree are logical block offsets into the file.
  */
 
-struct dirent;
 struct uio;
 struct xfs_bmap_free;
 struct xfs_dabuf;