how to delete files after chaning names

[kalenkovich]

I just figured out that we need to run linear filtering both with l_freq=None (for later use) and l_freq=1 (ICA only). I'll, therefore, rename our *_filtered.fif files to *_filteredHighPassNone.fif and add *_filteredHighPass1.fif*. The problem is that once I re-run Snakemake we will have all three kinds of files. This is a common enough problem that we should mention somewhere, maybe in a "common problems" appendix.

*I know these name suck balls but none of those options are BIDS-compliant anyway so we can come up with something better when we start BIDSifying our derivative files