Support Vim, Tmux, Emacs with Stow

After moving off of Meta, Dotfiles has a greater responsibility to
manage configs. Vim, Tmux, and Emacs are now within Stow's purview.

emacs.d/snippets/rjsx-mode/const-function

@@ -1,7 +0,0 @@
-# -*- mode: snippet -*-
-# name: const function
-# key: cfn
-# --
-const $1 = ($2) => {
-  $3
-}