Upgrade Sky's use of the JS bindings

sky/framework/shell.sky

Index: sky/framework/shell.sky
diff --git a/sky/framework/shell.sky b/sky/framework/shell.sky
index b23b470d4fef303b378250f8ef51eba9e05a980b..1e6c8690fe7f4b18f073110337c50bde6bc598a5 100644
--- a/sky/framework/shell.sky
+++ b/sky/framework/shell.sky
@@ -1,17 +1,11 @@
-<import src="/gen/mojo/public/sky/core.sky" as="core" />
 <import src="/gen/mojo/public/sky/connection.sky" as="connection" />
 <script>
-function wrapHandle(handle, service, client) {
-  return connection.bindProxyHandle(handle, service.client, service);
-}
-
 function connectToService(url, service, client) {
   var handle = internals.connectToService(url, service.name);
-  return wrapHandle(handle, service, client);
+  return connection.bindHandleToProxy(handle, service);
 }
 
 module.exports = {
   connectToService: connectToService,
-  wrapHandle: wrapHandle,
 };
 </script>