Remove logic for platform stlport gtest.

Now that the platforms stlport linked gtest is gone, we don't need the
logic for this any more. All platform tests will use libc++ (which has
been renamed to libgtest without a suffix).

Note that tests built with the NDK will still use stlport, but they
will use the NDK's stlport, not the platform's.

Bug: 15193147
Change-Id: Ifcb2489ed60c41e4ed028096b516c1ee643de907
diff --git a/core/target_test_internal.mk b/core/target_test_internal.mk
index ed011d1..f8a9f04 100644
--- a/core/target_test_internal.mk
+++ b/core/target_test_internal.mk
@@ -6,25 +6,10 @@
 
 LOCAL_C_INCLUDES += external/gtest/include
 
-my_test_libcxx := true
-ifdef LOCAL_SDK_VERSION
-my_test_libcxx := false
-endif
-ifneq ($(filter $(strip $(LOCAL_CXX_STL)),stlport stlport_static),)
-my_test_libcxx := false
-endif
-
-ifeq ($(my_test_libcxx),true)
-LOCAL_STATIC_LIBRARIES += libgtest_libc++ libgtest_main_libc++
-else
-LOCAL_STATIC_LIBRARIES += libgtest libgtest_main
-
 ifndef LOCAL_SDK_VERSION
-LOCAL_C_INCLUDES += bionic \
-                    bionic/libstdc++/include \
-                    external/stlport/stlport
-LOCAL_SHARED_LIBRARIES += libstlport libstdc++
-endif
+LOCAL_STATIC_LIBRARIES += libgtest libgtest_main
+else
+LOCAL_STATIC_LIBRARIES += libgtest_ndk libgtest_main_ndk
 endif
 
 ifdef LOCAL_MODULE_PATH