Dart: Removes dartzip

examples/dart/hello_world/hello/BUILD.gn

Index: examples/dart/hello_world/hello/BUILD.gn
diff --git a/examples/dart/hello_world/hello/BUILD.gn b/examples/dart/hello_world/hello/BUILD.gn
index 70c8a68cc3da7e83b81b9200511fd3ed7f7d0330..e5759945f8a895ccc8eceb34b4ee2d95145eae97 100644
--- a/examples/dart/hello_world/hello/BUILD.gn
+++ b/examples/dart/hello_world/hello/BUILD.gn
@@ -4,19 +4,9 @@
 
 import("//mojo/public/dart/rules.gni")
 
-dartzip_packaged_application("mojo_dart_hello_dartzip") {
-  output_name = "mojo_dart_hello"
-  sources = [
-    "lib/main.dart",
-    "pubspec.yaml",
-  ]
-  deps = [
-    "//mojo/public/dart:dart_dartzip",
-  ]
-}
-
-dart_pkg("mojo_dart_hello_pkg") {
+dart_pkg("hello") {
   apps = [ "lib/main.dart" ]
+  app_name_override = "dart_hello"
   sources = [
     "pubspec.yaml",
   ]
@@ -24,10 +14,3 @@ dart_pkg("mojo_dart_hello_pkg") {
     "//mojo/public/dart",
   ]
 }
-
-group("hello") {
-  deps = [
-    ":mojo_dart_hello_dartzip",
-    ":mojo_dart_hello_pkg",
-  ]
-}