Togglz: remove items left from >= 0.4.1 milestone

[0pdd]

The puzzle 605-2e5a00b2 from #605 has to be resolved:

mystamps/src/main/java/ru/mystamps/web/support/togglz/Features.java

Line 25 in 41b4250

// @todo #605 Togglz: remove items left from >= 0.4.1 milestone

The puzzle was created by Slava Semushin on 09-Sep-19.

[php-coder]

I looked on prod and I see that Togglz doesn't persist all these old features:

mysql> select * from TOGGLZ;
+---------------------------------+-----------------+-------------+-----------------+
| FEATURE_NAME                    | FEATURE_ENABLED | STRATEGY_ID | STRATEGY_PARAMS |
+---------------------------------+-----------------+-------------+-----------------+
| ADD_ADDITIONAL_IMAGES_TO_SERIES |               1 | NULL        | NULL            |
| CSP_REPORT_ONLY                 |               0 | NULL        | NULL            |
+---------------------------------+-----------------+-------------+-----------------+
2 rows in set (0.00 sec)

So, only ADD_ADDITIONAL_IMAGES_TO_SERIES needs to be cleaned up in this case.