Fix mojo_runner_unittests in debug builds.

mojo/runner/shell_test_main.cc

Index: mojo/runner/shell_test_main.cc
diff --git a/mojo/runner/shell_test_main.cc b/mojo/runner/shell_test_main.cc
index 17ec7d7bcfad8528bbd982d8006b80095ce171b2..fb32ff0fb937e3e3e656cc8f468f698346a5687c 100644
--- a/mojo/runner/shell_test_main.cc
+++ b/mojo/runner/shell_test_main.cc
@@ -26,8 +26,6 @@ int main(int argc, char** argv) {
 
   base::TestSuite test_suite(argc, argv);
 
-  mojo::embedder::test::InitWithSimplePlatformSupport();
-
   return base::LaunchUnitTests(
       argc, argv,
       base::Bind(&base::TestSuite::Run, base::Unretained(&test_suite)));