mm/vmscan: remove ignore_references argument of reclaim_pages()

All reclaim_pages() callers are setting 'ignore_references' parameter
'true'.  In other words, the parameter is not really being used.  Remove
the argument to make it simple.

Link: https://lkml.kernel.org/r/20240429224451.67081-4-sj@kernel.org


Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>