refactor(configs): 移除 ItemMergeConfig.json 中的冗余配置项

- 删除了 ItemMergeConfig.json 中的冗余配置项 72
- 优化配置文件结构，提高可维护性

configs/ItemMergeConfig.json

@@ -2252,19 +2252,6 @@
       }
     },
     "2": {
-      "72": {
-        "circle": 0,
-        "compose": { "id": 2, "type": 2, "count": 20000 },
-        "index": 3,
-        "text": "兑换",
-        "buttontxt10": "合成10次",
-        "mergebutton10": 1,
-        "Eid": 72,
-        "second_index": 2,
-        "table": [{ "id": 838, "type": 0, "count": 10 }],
-        "openserverday": 1,
-        "level": 1
-      },
       "73": {
         "circle": 0,
         "compose": { "id": 838, "type": 0, "count": 10 },