Revert "Fix for gtest missing core classes."

This reverts commit fa5480de6eca7f43b147c696bdb2936dc48d75d7.

Change-Id: Ifa9851f4f90af6093ed0bca852c55b3026fcd554
diff --git a/runtime/common_runtime_test.cc b/runtime/common_runtime_test.cc
index 5172fbe..c299210 100644
--- a/runtime/common_runtime_test.cc
+++ b/runtime/common_runtime_test.cc
@@ -197,11 +197,8 @@
   MemMap::Init();  // For LoadExpectSingleDexFile
 
   std::string error_msg;
-
-  for (const std::string &core_dex_file_name : GetLibCoreDexFileNames()) {
-    java_lang_dex_file_ = LoadExpectSingleDexFile(core_dex_file_name.c_str());
-    boot_class_path_.push_back(java_lang_dex_file_);
-  }
+  java_lang_dex_file_ = LoadExpectSingleDexFile(GetLibCoreDexFileName().c_str());
+  boot_class_path_.push_back(java_lang_dex_file_);
 
   std::string min_heap_string(StringPrintf("-Xms%zdm", gc::Heap::kDefaultInitialSize / MB));
   std::string max_heap_string(StringPrintf("-Xmx%zdm", gc::Heap::kDefaultMaximumSize / MB));
@@ -286,8 +283,8 @@
   Runtime::Current()->GetHeap()->VerifyHeap();  // Check for heap corruption after the test
 }
 
-std::vector<std::string> CommonRuntimeTest::GetLibCoreDexFileNames() {
-  return std::vector<std::string>({GetDexFileName("core-oj"), GetDexFileName("core-libart")});
+std::string CommonRuntimeTest::GetLibCoreDexFileName() {
+  return GetDexFileName("core-libart");
 }
 
 std::string CommonRuntimeTest::GetDexFileName(const std::string& jar_prefix) {