Remove the old package manager

mojo/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
 
 group("mojo") {
   # Meta-target, don't link into production code.
   testonly = true
   deps = [
@@ skipping 27 matching lines @@
     "//mojo/edk/system:mojo_message_pipe_perftests",
     "//mojo/edk/system:mojo_system_unittests",
     "//mojo/edk/test:mojo_public_bindings_unittests",
     "//mojo/edk/test:mojo_public_environment_unittests",
     "//mojo/edk/test:mojo_public_system_perftests",
     "//mojo/edk/test:mojo_public_system_unittests",
     "//mojo/edk/test:mojo_public_utility_unittests",
     "//mojo/services/network:apptests",
     "//mojo/shell:apptests",
     "//mojo/shell:mojo_shell_unittests",
-    "//mojo/shell/package_manager:unittests",
     "//mojo/shell/public/cpp/tests:mojo_public_application_unittests",
     "//mojo/shell/runner/host:mojo_runner_host_unittests",
   ]
 
   if (is_android) {
     deps += [ "//mojo/shell/standalone:mojo_shell_standalone_apptests_apk" ]
   }
 }