fix: remove useless thing

utils/tts/voicevox.js

@@ -1,28 +1,5 @@
 import { Config } from '../config.js'
-
-let proxy
-if (Config.proxy) {
-  try {
-    proxy = (await import('https-proxy-agent')).default
-  } catch (e) {
-    console.warn('未安装https-proxy-agent，请在插件目录下执行pnpm add https-proxy-agent')
-  }
-}
-
-const newFetch = (url, options = {}) => {
-  const defaultOptions = Config.proxy
-    ? {
-        agent: proxy(Config.proxy)
-      }
-    : {}
-
-  const mergedOptions = {
-    ...defaultOptions,
-    ...options
-  }
-
-  return fetch(url, mergedOptions)
-}
+import { newFetch } from '../proxy.js'
 
 /**
  * 生成voxTTSMode下的wav音频