Where’d that code go?

$ < ~/Binaries/git-find-removal
#!/bin/zsh
if [ $# != 2 ] ; then
  echo "$0 <commit> <string>" >/dev/stderr
  exit 1
fi
git bisect start
git bisect good $1
git bisect bad
git bisect run grep -qRE $2 .
$ git-find-removal HEAD~20 'def my_important_function'