[Extensions] Remove the "use_movable_types" entry from idl/json files

chrome/common/extensions/api/cast_streaming_receiver_session.idl

Index: chrome/common/extensions/api/cast_streaming_receiver_session.idl
diff --git a/chrome/common/extensions/api/cast_streaming_receiver_session.idl b/chrome/common/extensions/api/cast_streaming_receiver_session.idl
index 6c5f8caaa8bc17b68dfa6828c4736b8103538e18..15a7f0a7f493b23fb3a3ad6036e54620d9f8a600 100644
--- a/chrome/common/extensions/api/cast_streaming_receiver_session.idl
+++ b/chrome/common/extensions/api/cast_streaming_receiver_session.idl
@@ -5,7 +5,7 @@
 // The <code>chrome.cast.streaming.receiverSession</code> API creates a Cast
 // receiver session and adds the resulting audio and video tracks to a
 // MediaStream.
-[use_movable_types=true]namespace cast.streaming.receiverSession {
+namespace cast.streaming.receiverSession {
   // The UDP socket address and port.
   dictionary IPEndPoint {
     DOMString address;