Cleanup some channel code

Author: stroiman

browser/dom/xml-http-request_test.go

@@ -119,6 +119,7 @@ var _ = Describe("XmlHTTPRequest", func() {
 				return nil
 			}))
 			ended := make(chan bool)
+			defer close(ended)
 			xhr.AddEventListener(XHREventLoad, NewEventHandlerFunc(func(e Event) error {
 				loaded = true
 				ended <- true

browser/scripting/event_loop_test.go

@@ -35,8 +35,6 @@ var _ = Describe("EventLoop", func() {
 
 	It("Dispatches an 'error' event on unhandled error", func() {
 		ctx := NewTestContext(IgnoreUnhandledErrors)
-		c := make(chan bool)
-		defer close(c)
 		Expect(
 			ctx.RunTestScript(`
 				let val;