cr-restore: remove the duplicate round_up for restore_thread_vma_len

With some historical changes, the second page-aligned for
restore_thread_vma_len is reduplicate. So remove it.
Signed-off-by: Huang Qiang <h.huangqiang@huawei.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -1361,8 +1361,6 @@ static int sigreturn_restore(pid_t pid, CoreEntry *core, struct list_head *tgt_v
 			current->nr_threads,
 			KBYTES(restore_thread_vma_len));
 
-	restore_thread_vma_len = round_up(restore_thread_vma_len, PAGE_SIZE);
-
 	exec_mem_hint = restorer_get_vma_hint(pid, tgt_vmas, &self_vma_list,
 					      restorer_len +
 					      restore_task_vma_len +