either remove .yml configs in bin or fix + move them to where they are needed

[NickleDave]

currently there are .yml configs in the src/bin folder

I tried to use one to test the cli but got an error about invalid spect_params -- looks like these are leftovers from before changing how the Spectrogram class works
namely, this one:
https://github.com/NickleDave/hybrid-vocal-classifier/blob/main/src/bin/example.config.yml

but this one looks important since it documents how to reproduce the results used for SciPy proceedings paper / talk
https://github.com/NickleDave/hybrid-vocal-classifier/blob/main/src/bin/reproduce_ml_comp_results_extract.config.yml

and some of the others are presumably trying to document important things
need to determine if this is so, and if so, then make them discoverable / integrated into docs