refactor(llm): remove unused model.ts file

app/lib/.server/llm/model.ts

@@ -1,25 +0,0 @@
-import { getCurrentLLMType } from './llm-selector';
-import { AnthropicLLM } from './anthropic-llm';
-import { OpenAILLM } from './openai-llm';
-import type { LLM } from './llm-interface';
-
-export function getModel(apiKey: string): LLM {
-  const llmType = getCurrentLLMType();
-
-  let llm: LLM;
-
-  switch (llmType) {
-    case 'anthropic':
-      llm = new AnthropicLLM();
-      (llm as AnthropicLLM).setApiKey(apiKey);
-      break;
-    case 'openai':
-      llm = new OpenAILLM();
-      (llm as OpenAILLM).setApiKey(apiKey);
-      break;
-    default:
-      throw new Error(`Unsupported LLM type: ${llmType}`);
-  }
-
-  return llm;
-}