mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat()

Commit c0cb9d9 ("mm/damon/paddr: report filter-passed bytes back for
DAMOS_STAT action") added unused variable in damon_pa_stat(), due to a
copy-and-paste error.  Remove it.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: c0cb9d9 ("mm/damon/paddr: report filter-passed bytes back for DAMOS_STAT action")
Signed-off-by: SeongJae Park <[email protected]>
Cc: Brendan Higgins <[email protected]>
Cc: David Gow <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Shuah Khan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: sjp38

mm/damon/paddr.c

@@ -548,7 +548,6 @@ static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
 		unsigned long *sz_filter_passed)
 {
 	unsigned long addr;
-	LIST_HEAD(folio_list);
 	struct folio *folio;
 
 	if (!damon_pa_scheme_has_filter(s))