mm/swapfile: remove pr_debug in get_swap_pages()

It's known that get_swap_pages() may fail to find available space under
some extreme case, but pr_debug() provides useless information.  Let's
remove it.

Link: https://lkml.kernel.org/r/20230131071035.1085968-1-xialonglong1@huawei.com
Signed-off-by: Longlong Xia <xialonglong1@huawei.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Chen Wandun <chenwandun@huawei.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/swapfile.c

@@ -1098,8 +1098,6 @@ int get_swap_pages(int n_goal, swp_entry_t swp_entries[], int entry_size)
 		spin_unlock(&si->lock);
 		if (n_ret || size == SWAPFILE_CLUSTER)
 			goto check_out;
-		pr_debug("scan_swap_map of si %d failed to find offset\n",
-			si->type);
 		cond_resched();
 
 		spin_lock(&swap_avail_lock);