remove subtitle control

packages/artplayer/src/i18n/zh-cn.json

@@ -11,8 +11,6 @@
     "Horizontal": "水平",
     "Vertical": "垂直",
     "Reconnect": "重新连接",
-    "Hide Subtitle": "隐藏字幕",
-    "Show Subtitle": "显示字幕",
     "Show Setting": "显示设置",
     "Hide Setting": "隐藏设置",
     "Screenshot": "截图",