remove useless dialog

src/strings/zh-cn.json

@@ -62,7 +62,6 @@
     "ButtonAudioTracks": "音轨",
     "ButtonBack": "返回",
     "ButtonCancel": "取消",
-    "ButtonChangeContentType": "更改内容类型",
     "ButtonChangeServer": "更改服务器",
     "ButtonConnect": "连接",
     "ButtonDelete": "删除",
@@ -281,8 +280,6 @@
     "HeaderBranding": "品牌",
     "HeaderCastAndCrew": "演员表",
     "HeaderCastCrew": "演职人员",
-    "HeaderChangeFolderType": "更改内容类型",
-    "HeaderChangeFolderTypeHelp": "为了改变类型，请移除这个媒体库并以你需要的新类型重新建立一个媒体库。",
     "HeaderChannelAccess": "频道访问",
     "HeaderChannels": "频道",
     "HeaderChapterImages": "章节图片",