chore(discord-gateway): remove unused imports from response logger

- aiAnalyzer.ts: removed unused logAnalysisSummary and logFalsePositiveDetected
- llmModerationClient.ts: removed unused logVisionAnalysis, logVisionError, logRetryAttempt

These functions are not called in the codebase.

services/discord-gateway/src/modules/ai-moderation/aiAnalyzer.ts

@@ -29,8 +29,6 @@ import { attemptAutoDeleteFlaggedMessage } from "./autoDeleteManager.js";
 import { buildConversationContext } from "./conversationContext.js";
 import { runModerationAnalysis } from "./llmModerationClient.js";
 import {
-  logAnalysisSummary,
-  logFalsePositiveDetected,
   logModerationError,
 } from "./responseLogger.js";
 

services/discord-gateway/src/modules/ai-moderation/llmModerationClient.ts

@@ -36,12 +36,9 @@ import {
 } from "./textCacheStore.js";
 import { extractUrlsFromText, fetchUrlSafely } from "./urlFetcher.js";
 import {
-  logVisionAnalysis,
   logCacheEvent,
   logModerationAnalysis,
   logModerationError,
-  logVisionError,
-  logRetryAttempt,
 } from "./responseLogger.js";
 
 const SeveritySchema = z.enum(["none", "low", "medium", "high", "critical"]);