> > find . -name whatever\* -type f -print -delete

Or you can also do it all in Perl:

    perl -E 'while (<whatever*>) { say; unlink }'

EDIT: As tyingq points out (https://news.ycombinator.com/item?id=13065132), I forgot that `find` recurses into subdirectories. I don't know a way to make Perl do the same that doesn't start getting more verbose (but there must be a Perl golfer somewhere around here who does …).