Revert "Track changes to inject_signal in a378ba9b to the examples"

examples/injection_examples/basic_tutorial.py

...injection_examples/basic_tutorial_dist_time_phase_marg.py

...ples/injection_examples/basic_tutorial_time_phase_marg.py

examples/injection_examples/change_sampled_parameters.py

examples/injection_examples/create_your_own_source_model.py

...tion_examples/create_your_own_time_domain_source_model.py

examples/injection_examples/how_to_specify_the_prior.py

examples/injection_examples/marginalized_likelihood.py

examples/injection_examples/sine_gaussian_example.py

test/detector_tests.py

test/make_standard_data.py