more comprehensive deletion, no need to keep empty data lines

stats/active_user.csv

@@ -25,6 +25,4 @@
 2023-06-01T05:00:02+00:00,/,4577
 2023-07-01T05:00:04+00:00,/,4533
 2023-08-01T05:15:59+00:00,/,5658
-2023-09-01T05:00:08+00:00,/,
-2023-10-01T05:00:09+00:00,/,
 2024-02-01T18:59:21+00:00,/,7165