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The samples/bpf has become outdated and often does not follow up with the latest. This commit removes obsolete tracing-related tests. Specifically, 'test_overhead' is duplicate with selftests (and bench), and 'test_override_return', 'test_probe_write_user' tests are obsolete since they have been replaced by kprobe_multi_override and probe_user from selftests respectively. The following files are removed: - test_overhead: tests the overhead of BPF programs with task_rename, now covered by selftests and benchmark tests (rename-*). [1] - test_override_return: tests the return override functionality, now handled by kprobe_multi_override in selftests. - test_probe_write_user: tests the probe_write_user functionality, now replaced by the probe_user test in selftests. This cleanup will help to streamline the testing framework by removing redundant tests. [1]: https://patchwork.kernel.org/cover/13759916 Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Link: https://lore.kernel.org/r/20241011044847.51584-5-danieltimlee@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>