Dart: Removes dartzip

mojo/common/dart/BUILD.gn

Index: mojo/common/dart/BUILD.gn
diff --git a/mojo/common/dart/BUILD.gn b/mojo/common/dart/BUILD.gn
index 5637a6796e85226ee441f05e4f3964299faeab21..e2960779b108a4bbdce8de471e8cd006b67077f4 100644
--- a/mojo/common/dart/BUILD.gn
+++ b/mojo/common/dart/BUILD.gn
@@ -4,19 +4,7 @@
 
 import("//mojo/public/dart/rules.gni")
 
-dartzip_package("dart_dartzip") {
-  sources = [
-    "lib/trace_provider_impl.dart",
-    "lib/tracing_helper.dart",
-    "pubspec.yaml",
-  ]
-  deps = [
-    "//mojo/public/dart:dart_dartzip",
-    "//mojo/services/tracing/public/interfaces",
-  ]
-}
-
-dart_pkg("dart_pkg") {
+dart_pkg("dart") {
   libs = [ "lib/tracing_helper.dart" ]
   sources = [
     "lib/trace_provider_impl.dart",
@@ -27,10 +15,3 @@ dart_pkg("dart_pkg") {
     "//mojo/dart/mojo_services",
   ]
 }
-
-group("dart") {
-  deps = [
-    ":dart_dartzip",
-    ":dart_pkg",
-  ]
-}