mm: remove check_move_unevictable_pages()

All callers have now been converted to call
check_move_unevictable_folios().

Link: https://lkml.kernel.org/r/20230621164557.3510324-7-willy@infradead.org


Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>