Remove test that had undefined behavior and thus did not pass on some platforms.

src/google/protobuf/repeated_field_unittest.cc

@@ -592,7 +592,6 @@ TEST_F(RepeatedPtrFieldIteratorTest, Comparable) {
 }
 
 // Uninitialized iterator does not point to any of the RepeatedPtrField.
-// Dereferencing an uninitialized iterator crashes the process.
 TEST_F(RepeatedPtrFieldIteratorTest, UninitializedIterator) {
   RepeatedPtrField<string>::iterator iter;
   EXPECT_TRUE(iter != proto_array_.begin());
@@ -600,9 +599,6 @@ TEST_F(RepeatedPtrFieldIteratorTest, UninitializedIterator) {
   EXPECT_TRUE(iter != proto_array_.begin() + 2);
   EXPECT_TRUE(iter != proto_array_.begin() + 3);
   EXPECT_TRUE(iter != proto_array_.end());
-#ifdef GTEST_HAS_DEATH_TEST
-  ASSERT_DEATH(GOOGLE_LOG(INFO) << *iter, "");
-#endif
 }
 
 TEST_F(RepeatedPtrFieldIteratorTest, STLAlgorithms_lower_bound) {