Remove unnecessary comment

dotfiles/bash/main.bashrc

 export PRETTY=color
 export PRETTY_DEBUG_EXCLUDE=inigrep
 
-# make green git bash trinket even cooler
 GIT_PS1_SHOWDIRTYSTATE=true
 GIT_PS1_SHOWUNTRACKEDFILES=true
 GIT_DISABLED_COMMANDS="$HOME/.gittum/disabled-commands"