refactor: drop unused DailyLoginBonuses table + importer

The captured shape ({"1":[], "3":[], "4":[]}) is the empty-period
wire echo; the client parser (LoadDetail.cs:553) only reads normal/total/
campaign. Table, entity, seed, and importer were never wired to a code path.

Replaced by config-section catalog + service in the follow-up commits.

SVSim.Bootstrap/Data/seeds/daily-login-bonus.json

@@ -1,14 +0,0 @@
-[
-  {
-    "id": 1,
-    "bonus_data": []
-  },
-  {
-    "id": 3,
-    "bonus_data": []
-  },
-  {
-    "id": 4,
-    "bonus_data": []
-  }
-]