[GFS2] Remove unused field in struct gfs2_inode

Removes a field that is not used.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/incore.h

@@ -274,7 +274,6 @@ struct gfs2_inode {
 
 	spinlock_t i_spin;
 	struct rw_semaphore i_rw_mutex;
-	unsigned long i_last_pfault;
 };
 
 /*

fs/gfs2/ops_super.c

@@ -487,7 +487,6 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
 	if (ip) {
 		ip->i_flags = 0;
 		ip->i_gl = NULL;
-		ip->i_last_pfault = jiffies;
 	}
 	return &ip->i_inode;
 }