Update file_info.go (fix errcheck issue) (#28966)

Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

server/.golangci.yml

@@ -92,7 +92,6 @@ issues:
         channels/app/export_test.go|\
         channels/app/file.go|\
         channels/app/file_bench_test.go|\
-        channels/app/file_info.go|\
         channels/app/file_test.go|\
         channels/app/helper_test.go|\
         channels/app/import_functions.go|\