Lawrence Wolf-Sonkin 038e392ebd [gtest] Drop custom-rolled heterogeneous comparator functors in favor of C++ standard ones
* Standard heterogeneous comparator functors such as `std::equal_to<>` and `std::less<>` [have been available since C++14](https://en.cppreference.com/w/cpp/utility/functional/less_void)
* Now that [C++14 is the minimum supported version of C++ in Googletest](https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md), let's delete these duplications of the standard library

PiperOrigin-RevId: 515743068
Change-Id: I1563a2f94039c3a6688429298555545a922f6d7e
2023-03-10 14:43:13 -08:00
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2023-03-07 03:06:06 -08:00