In `<version>` and test files, `__cpp_lib_destroying_delete` is already properly guarded with standard modes, so it's redundant to say standard revision in `test_suite_guard`/`libcxx_guard`.
In `<version>` and test files, `__cpp_lib_destroying_delete` is already properly guarded with standard modes, so it's redundant to say standard revision in `test_suite_guard`/`libcxx_guard`.