fix: remove unsupported config parameters from kilo.jsonc

defaultAgent, defaultModel, smallModel are not supported by Kilo Code.
These cause Kilo Code to fail on startup.

.kilo/kilo.jsonc

@@ -4,9 +4,6 @@
   "skills": {
     "paths": [".kilo/skills"]
   },
-  "defaultAgent": "orchestrator",
-  "defaultModel": "qwen/qwen3.6-plus:free",
-  "smallModel": "openai/llama-3.1-8b-instant",
   "agent": {
     "orchestrator": {
       "model": "ollama-cloud/glm-5",