Remove Client relationship between mojo.Shell/mojo.Application

mojo/public/cpp/application/lib/application_test_main.cc

Index: mojo/public/cpp/application/lib/application_test_main.cc
diff --git a/mojo/public/cpp/application/lib/application_test_main.cc b/mojo/public/cpp/application/lib/application_test_main.cc
index 3f96a478126b47663d3437aa71b75826ebb6abe6..128d8aef350067ba168a146266740cc7696128a4 100644
--- a/mojo/public/cpp/application/lib/application_test_main.cc
+++ b/mojo/public/cpp/application/lib/application_test_main.cc
@@ -5,13 +5,10 @@
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_test_base.h"
 #include "mojo/public/cpp/environment/environment.h"
-#include "mojo/public/interfaces/application/shell.mojom.h"
 
-MojoResult MojoMain(MojoHandle shell_handle) {
+MojoResult MojoMain(MojoHandle handle) {
   // An Environment instance is needed to construct run loops.
   mojo::Environment environment;
 
-  mojo::ShellPtr shell;
-  shell.Bind(MakeScopedHandle(mojo::MessagePipeHandle(shell_handle)));
-  return mojo::test::RunAllTests(shell.Pass());
+  return mojo::test::RunAllTests(handle);
 }