delete version controlled oh-my-zsh
Squashed 'config/oh-my-zsh/' content from commit 1b7a3ea

git-subtree-dir: config/oh-my-zsh
git-subtree-split: 1b7a3ea99a8b566510ab7881063148c43be6b98d
Merge commit '236b8580b9c7471c2886b853e612b78ef001f7d8' as 'config/oh-my-zsh'