Remove git heroku alias
Remove git heroku alias

Now that my faith-dashboard project has production and staging remotes,
I need to switch to using `git push` directly rather than having an
alias that can only push to one of the environments.

Maybe in the future, I can replace `git heroku` with aliases for each
environment, like `git prod` and `git stg`.

caleb531/dotfiles,caleb531/dotfiles,caleb531/dotfiles,caleb531/dotfiles