Fix Clang warning:
| warning: definition of implicit copy constructor for 'ValueArray2<bool, bool>'
| is deprecated because it has a user-declared copy assignment operator [-Wdeprecated]
As mentioned in issue #360:
"Now that all the platforms gtest supports work with value-parameterized
tests, we should remove the uses of the GTEST_HAS_PARAM_TESTS macro from
the codebase everywhere."
https://github.com/google/googletest/issues/360