Removes code using mus client lib

ui/views/test/platform_test_helper.cc

Index: ui/views/test/platform_test_helper.cc
diff --git a/ui/views/test/platform_test_helper.cc b/ui/views/test/platform_test_helper.cc
index 488a9e58fd36bd58e0ccdc38cef2fcebee57fbd6..c6204abde63baed51cf57c37f4ad3fdb44632be7 100644
--- a/ui/views/test/platform_test_helper.cc
+++ b/ui/views/test/platform_test_helper.cc
@@ -18,7 +18,6 @@ namespace {
 
 PlatformTestHelper::Factory test_helper_factory;
 bool is_mus = false;
-bool is_aura_mus_client = false;
 
 }  // namespace
 
@@ -44,16 +43,6 @@ bool PlatformTestHelper::IsMus() {
   return is_mus;
 }
 
-// static
-void PlatformTestHelper::SetIsAuraMusClient() {
-  is_aura_mus_client = true;
-}
-
-// static
-bool PlatformTestHelper::IsAuraMusClient() {
-  return is_aura_mus_client;
-}
-
 #if defined(USE_AURA)
 void PlatformTestHelper::SimulateNativeDestroy(Widget* widget) {
   delete widget->GetNativeView();