chore: remove ignored files from repo

backend/data/llm_config.json

@@ -1,25 +0,0 @@
-[
-  {
-    "id": "m1773487590",
-    "provider": "openai",
-    "model": "glm-4-7-251222",
-    "api_key": "4a54896c-dac5-4aa6-b618-558dfbd89e4a",
-    "api_base": "https://ark.cn-beijing.volces.com/api/v3",
-    "extra_headers": {},
-    "is_active": true,
-    "name": "glm-4-7-251222",
-    "model_type": "\u5927\u8bed\u8a00\u6a21\u578b",
-    "base_model": "glm-4-7-251222",
-    "protocol_type": "OpenAI"
-  },
-  {
-    "id": "1773821572966",
-    "name": "gpt-5.4-nano",
-    "provider": "openai",
-    "model": "gpt-5.4-nano",
-    "api_key": "sk-zk2ca620045b2dd262d45594db34aa9fc7f688602b1f01ba",
-    "api_base": "https://api.zhizengzeng.com/v1",
-    "extra_headers": {},
-    "is_active": false
-  }
-]

backend/data/workspace/cron/jobs.json

@@ -1,4 +0,0 @@
-{
-  "version": 1,
-  "jobs": []
-}