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

extensions/common/api/mojo_private.idl

Index: extensions/common/api/mojo_private.idl
diff --git a/extensions/common/api/mojo_private.idl b/extensions/common/api/mojo_private.idl
index 0c3a0f181079c76037dc74d038ac1fdd5ef48d5b..7a8ddd0621d7827e5b20f7a0d27482c512be4ce8 100644
--- a/extensions/common/api/mojo_private.idl
+++ b/extensions/common/api/mojo_private.idl
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 // The chrome.mojoPrivate API provides access to the mojo modules.
-[use_movable_types=true] namespace mojoPrivate {
+namespace mojoPrivate {
 
   // |modules| is an array of the values returned by |dependencies| factories.
   callback DefineCallback = void (any[] modules);