Revert "git-find - shortcut to run find(1)"

This reverts commit 4fe3904165720525e193978ecb2c22ca043bf8b6.

It was not very useful in this form,
so give the namespace back
git commit-retro - cook up --date and --author

useful for committing changes made by
  yourself ages ago and not committed, or
  other people in a group-shared working copy