Revert "Make instanceof and Object.getPrototypeOf work for proxies, plus a few other tweaks."

src/proxy.js

Index: src/proxy.js
diff --git a/src/proxy.js b/src/proxy.js
index cb9c020e35c60c9b0cdcf15e961ca9a8fdb73789..d90e5d4ca8ad50f9a2793a74fc20cb4d2ceb5130 100644
--- a/src/proxy.js
+++ b/src/proxy.js
@@ -60,9 +60,8 @@ $Proxy.createFunction = function(handler, callTrap, constructTrap) {
 }
 
 $Proxy.create = function(handler, proto) {
-  if (!IS_SPEC_OBJECT(handler))
-    throw MakeTypeError("handler_non_object", ["create"])
-  if (!IS_SPEC_OBJECT(proto)) proto = null  // Mozilla does this...
+  if (!IS_SPEC_OBJECT(handler)) throw TypeError
+  if (!IS_SPEC_OBJECT(proto)) proto = $Object.prototype
   return %CreateJSProxy(handler, proto)
 }
 
@@ -131,7 +130,3 @@ function DerivedSetTrap(receiver, name, val) {
     configurable: true});
   return true;
 }
-
-function DerivedHasTrap(name) {
-  return !!this.getPropertyDescriptor(name)
-}