remove autoPip

docs/assets/example/index.js

@@ -23,7 +23,6 @@ var art = new Artplayer({
     localVideo: true,
     localSubtitle: true,
     networkMonitor: false,
-    autoPip: true,
     mutex: true,
     light: true,
     backdrop: true,

packages/artplayer/src/index.js

@@ -120,7 +120,6 @@ class Artplayer extends Emitter {
             miniProgressBar: false,
             localVideo: false,
             localSubtitle: false,
-            autoPip: false,
             networkMonitor: false,
             layers: [],
             contextmenu: [],