remove guild related content

Author: Linwenxuan04

cmd/gocq/main.go

@@ -105,7 +105,6 @@ func PrepareData() {
 	mkCacheDir(global.VoicePath, "语音")
 	mkCacheDir(global.VideoPath, "视频")
 	mkCacheDir(global.CachePath, "发送图片")
-	mkCacheDir(path.Join(global.ImagePath, "guild-images"), "频道图片缓存")
 	mkCacheDir(global.VersionsPath, "版本缓存")
 	cache.Init()