[XFS] Remove v1 dir trace macro - missed in a past commit.

Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/Makefile-linux-2.6

@@ -30,7 +30,6 @@ ifeq ($(CONFIG_XFS_TRACE),y)
 	EXTRA_CFLAGS += -DXFS_BLI_TRACE
 	EXTRA_CFLAGS += -DXFS_BMAP_TRACE
 	EXTRA_CFLAGS += -DXFS_BMBT_TRACE
-	EXTRA_CFLAGS += -DXFS_DIR_TRACE
 	EXTRA_CFLAGS += -DXFS_DIR2_TRACE
 	EXTRA_CFLAGS += -DXFS_DQUOT_TRACE
 	EXTRA_CFLAGS += -DXFS_ILOCK_TRACE