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

chrome/common/extensions/api/platform_keys.idl

Index: chrome/common/extensions/api/platform_keys.idl
diff --git a/chrome/common/extensions/api/platform_keys.idl b/chrome/common/extensions/api/platform_keys.idl
index 029f2ab38ad3fd6b2a3216daef62852272ee833d..dc875fc5f1a5607835d9423efe179c3d067a8fcb 100644
--- a/chrome/common/extensions/api/platform_keys.idl
+++ b/chrome/common/extensions/api/platform_keys.idl
@@ -7,7 +7,7 @@
 // extension can use such a certficate in its custom authentication protocol.
 // E.g. this allows usage of platform managed certificates in third party VPNs
 // (see $(ref:vpnProvider chrome.vpnProvider)).
-[use_movable_types=true] namespace platformKeys {
+namespace platformKeys {
   [noinline_doc] dictionary Match {
      // The DER encoding of a X.509 certificate.
      ArrayBuffer certificate;