svcrpc: move unused field from cache_deferred_req

This field is set once and never used; probably some artifact of an
earlier implementation idea.

Signed-off-by: J. Bruce Fields <[e-mail]>

include/linux/sunrpc/cache.h

···
 	struct list_head	hash;	/* on hash chain */
 	struct list_head	recent; /* on fifo */
 	struct cache_head	*item;  /* cache item we wait on */
-	time_t			recv_time;
 	void			*owner; /* we might need to discard all defered requests
 					 * owned by someone */
 	void			(*revisit)(struct cache_deferred_req *req,

net/sunrpc/cache.c

···
 		return -ETIMEDOUT;
 
 	dreq->item = item;
-	dreq->recv_time = get_seconds();
 
 	spin_lock(&cache_defer_lock);