fix: remove outdated Chainlit config, let it auto-generate

Chainlit 2.9.6 rejects the manually-created config.toml as outdated.
Let it generate its own at runtime.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.chainlit/config.toml

@@ -1,16 +0,0 @@
-[project]
-enable_telemetry = false
-
-[UI]
-name = "TradingAgents"
-description = "Multi-Agent LLM Trading Analysis"
-default_collapse_content = true
-hide_cot = false
-
-[UI.theme.light]
-primary = "#1a73e8"
-background = "#ffffff"
-
-[UI.theme.dark]
-primary = "#00f0ff"
-background = "#09090b"