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In commit2c2291bbe0(ENH: add new feature to ctest so that it can cmake, build and run a test executable, 2004-01-07, v2.4.0~3483) ctest was taught to recognize tests that run ctest itself and run them internally instead of spawning a new process. This optimization was removed by commitb9daa192af(ENH: Refactored CTest test execution code into an object, 2009-08-19, v2.8.0~276) `cmCTestRunTest` replaced `cmCTestTestHandler::ProcessOneTest`, which was eventually removed by commit5a5cc52230(Fixed conversion warning on 64 bit machines, 2009-08-31, v2.8.0~241). Since then the optimization was only left in `--build-and-test` mode, likely by accident, where it makes little difference. Remove it to simplify the code. Also drop the `--force-new-ctest-process` option, originally added by commit9255e40d81(ENH: Add a way to force ctest to be a new process, 2004-05-10, v2.4.0~3101), since it no longer does anything.