Bug 1405820 - Remove ReportUsageErrorASCII assertions that are invalid when used with shell clone() function, r=waldo.

js/src/jit-test/tests/basic/bug1405820.js

@@ -0,0 +1,5 @@
+// |jit-test| error: Error
+
+var g = newGlobal();
+g.f = setJitCompilerOption;
+g.eval("clone(f)()(9)")

js/src/jscntxt.cpp

@@ -491,14 +491,6 @@ js::ReportErrorVA(JSContext* cx, unsigned flags, const char* format,
 void
 js::ReportUsageErrorASCII(JSContext* cx, HandleObject callee, const char* msg)
 {
-    const char* usageStr = "usage";
-    PropertyName* usageAtom = Atomize(cx, usageStr, strlen(usageStr))->asPropertyName();
-    RootedId id(cx, NameToId(usageAtom));
-    DebugOnly<Shape*> shape = static_cast<Shape*>(callee->as<JSFunction>().lookup(cx, id));
-    MOZ_ASSERT(!shape->configurable());
-    MOZ_ASSERT(!shape->writable());
-    MOZ_ASSERT(shape->hasDefaultGetter());
-
     RootedValue usage(cx);
     if (!JS_GetProperty(cx, callee, "usage", &usage))
         return;