[mypy] Fix type annotations in `graphs/boruvka.py` (#5794)

* Fix type annotations in boruvka.py

* Remove graphs/boruvka.py|

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

Dylan Buchi committed 4y ago

ac4bdfd66dbbd4c7c92c73d894469aa4a5c3e5ab

Parent: 2f6a7ae

Committed by GitHub <noreply@github.com> on 11/8/2021, 1:47:09 PM