lguest: remove unused "wake" element from struct lguest

	u32 pgdidx;

	struct pgdir pgdirs[4];

	/* Cached wakeup: we hold a reference to this task. */

	struct task_struct *wake;

	unsigned long noirq_start, noirq_end;

	unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */