Dart: Removes dartzip

mojo/public/tools/BUILD.gn

Index: mojo/public/tools/BUILD.gn
diff --git a/mojo/public/tools/BUILD.gn b/mojo/public/tools/BUILD.gn
index 28a49258fafb1929279dc98876684bf2a8cf7f9e..1162586f9de638de9f031a4680c4e16691edbdd4 100644
--- a/mojo/public/tools/BUILD.gn
+++ b/mojo/public/tools/BUILD.gn
@@ -101,18 +101,3 @@ if (mojo_use_prebuilt_network_service) {
     ]
   }
 }
-
-# This rule can be seen as a sort of adapter. This takes a dart framework
-# loaded from Google Storage and then puts it in a rule which the
-# "dartzip_package" template in mojo/public/dart/rules.gni can introspect on,
-# accessing the 'label' and 'target_out_dir' variables.
-if (mojo_use_dart_apptest_framework) {
-  copy("dart_apptest_framework") {
-    sources = [
-      "prebuilt/frameworks/apptest.dartzip",
-    ]
-    outputs = [
-      "$target_out_dir/dart_apptest_framework.dartzip",
-    ]
-  }
-}