Dart: Removes dartzip

services/dart/test/echo/BUILD.gn

Index: services/dart/test/echo/BUILD.gn
diff --git a/services/dart/test/echo/BUILD.gn b/services/dart/test/echo/BUILD.gn
index dd3467dac24fc8b89f719dac7541d1e39e5f443d..01b3637c6e2013a1ea12fc099dbf5de2d46db1e4 100644
--- a/services/dart/test/echo/BUILD.gn
+++ b/services/dart/test/echo/BUILD.gn
@@ -4,19 +4,9 @@
 
 import("//mojo/public/dart/rules.gni")
 
-dartzip_packaged_application("mojo_dart_echo_dartzip") {
-  sources = [
-    "lib/main.dart",
-    "pubspec.yaml",
-  ]
-  deps = [
-    "//mojo/public/dart:dart_dartzip",
-    "//services/dart/test:echo_service_interface",
-  ]
-}
-
-dart_pkg("mojo_dart_echo_pkg") {
+dart_pkg("echo") {
   apps = [ "lib/main.dart" ]
+  app_name_override = "dart_echo"
   sources = [
     "pubspec.yaml",
   ]
@@ -25,10 +15,3 @@ dart_pkg("mojo_dart_echo_pkg") {
     "//services/dart/test:echo_service_interface",
   ]
 }
-
-group("echo") {
-  deps = [
-    ":mojo_dart_echo_dartzip",
-    ":mojo_dart_echo_pkg",
-  ]
-}