Revert of Mojo JS bindings: change module loading solution.

mojo/public/tools/bindings/mojom.gni

Index: mojo/public/tools/bindings/mojom.gni
diff --git a/mojo/public/tools/bindings/mojom.gni b/mojo/public/tools/bindings/mojom.gni
index 4a244fb5b11de7f387a8b454e9c5bedd861410f5..246663672eb281df9fd5c3befbaf54f588e214d8 100644
--- a/mojo/public/tools/bindings/mojom.gni
+++ b/mojo/public/tools/bindings/mojom.gni
@@ -133,13 +133,6 @@
 #
 #   cpp_only (optional)
 #       If set to true, only the C++ bindings targets will be generated.
-#
-#   use_new_js_bindings (optional)
-#       If set to true, the generated JS code will use the new module loading
-#       approach and the core API exposed by Web IDL.
-#
-#       TODO(yzshen): Switch all existing users to use_new_js_bindings=true and
-#       remove the old mode.
 #
 # The following parameters are used to support the component build. They are
 # needed so that bindings which are linked with a component can use the same
@@ -441,11 +434,6 @@
         if (defined(invoker.use_once_callback) && invoker.use_once_callback) {
           args += [ "--use_once_callback" ]
         }
-
-        if (defined(invoker.use_new_js_bindings) &&
-            invoker.use_new_js_bindings) {
-          args += [ "--use_new_js_bindings" ]
-        }
       }
     }