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

extensions/common/api/diagnostics.idl

Index: extensions/common/api/diagnostics.idl
diff --git a/extensions/common/api/diagnostics.idl b/extensions/common/api/diagnostics.idl
index f340fafeb8620ffe9a9275a3215125f007f54837..5f8f31d76aeec545280573d7f442b23006ac1d26 100644
--- a/extensions/common/api/diagnostics.idl
+++ b/extensions/common/api/diagnostics.idl
@@ -4,7 +4,7 @@
 
 // Use the <code>chrome.diagnostics</code> API to query various properties of
 // the environment that may be useful for diagnostics.
-[use_movable_types=true] namespace diagnostics {
+namespace diagnostics {
   dictionary SendPacketOptions {
     // Target IP address.
     DOMString ip;