Refactor a few things

runs/dev_tools

@@ -1,3 +0,0 @@
-#!/bin/zsh
-
-brew install git tmux

runs/git

@@ -0,0 +1,2 @@
+#!/bin/zsh
+brew install git

runs/tmux

@@ -0,0 +1,2 @@
+#!/bin/zsh
+brew install tmux