Revert "Add first login and get reward."

This reverts commit 9bfd474a41c169328d584052104eab1703dbcfb2.

It has confiliction from checking match results. First login reward will be
added later.

TODO: find scenario when unchecked match result and first login reward exist
simultaneously.
Move confirm_league_match_results to __confirm_league_match_results

In any confirming case, it should be used one by one.