Removes uses of GTEST_HAS_STD_STRING.

test/gtest-message_test.cc

@@ -92,8 +92,6 @@ TEST(MessageTest, StreamsNullCString) {
   EXPECT_STREQ("(null)", ToCString(Message() << p));
 }
 
-#if GTEST_HAS_STD_STRING
-
 // Tests streaming std::string.
 //
 // As std::string has problem in MSVC when exception is disabled, we only
@@ -113,8 +111,6 @@ TEST(MessageTest, StreamsStringWithEmbeddedNUL) {
                ToCString(Message() << string_with_nul));
 }
 
-#endif  // GTEST_HAS_STD_STRING
-
 // Tests streaming a NUL char.
 TEST(MessageTest, StreamsNULChar) {
   EXPECT_STREQ("\\0", ToCString(Message() << '\0'));