git_prompt_info no longer used in bobby

[utako]

The change in the bobby theme discussed here requires that we make a change. We can just rename this function or just make our own custom theme to avoid having to make these changes in the future.

I propose this prompt_command:

PS1="\n$(battery_char) $(clock_prompt) 🐌  ${yellow}$(ruby_version_prompt) ${purple}\h ${reset_color}in ${green}\w\n${bold_cyan}$(scm_char)${green}$(git_prompt_info) ${green}→${reset_color} "

[aramprice]

I think that we should override git_prompt_vars or better yet add git-duet support to bash_it directly.