Removes unused embedding queue

Removes the unused embedding queue property from the Gemini embedder class.

This simplifies the class and removes potential confusion. The queue was initialized but never used, indicating it was likely a remnant of previous development.

Author: ChuKhaLi

src/services/code-index/embedders/gemini.ts

@@ -9,7 +9,6 @@ import { GEMINI_RATE_LIMIT_DELAY_MS, MAX_BATCH_RETRIES, INITIAL_RETRY_DELAY_MS }
 export class CodeIndexGeminiEmbedder extends GeminiHandler implements IEmbedder {
 	private readonly defaultModelId: string
 	private readonly defaultTaskType: string
-	private embeddingQueue: Promise<void> = Promise.resolve() // Sequential queue for embedding operations
 
 	/**
 	 * Creates a new Gemini embedder instance.