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

chrome/common/extensions/api/automation_internal.idl

Index: chrome/common/extensions/api/automation_internal.idl
diff --git a/chrome/common/extensions/api/automation_internal.idl b/chrome/common/extensions/api/automation_internal.idl
index 825742b2a593e3abfac947348411fca22f2f7ed3..12eca7873ee7c2a9ae953eb22836360d4040a1e4 100644
--- a/chrome/common/extensions/api/automation_internal.idl
+++ b/chrome/common/extensions/api/automation_internal.idl
@@ -5,7 +5,7 @@
 // This is the implementation layer of the chrome.automation API, and is
 // essentially a translation of the internal accessibility tree update system
 // into an extension API.
-[use_movable_types=true] namespace automationInternal {
+namespace automationInternal {
   // Data for an accessibility event and/or an atomic change to an accessibility
   // tree. See ui/accessibility/ax_tree_update.h for an extended explanation of
   // the tree update format.