remove orphan files: autostart.sh and tracked mako/config

scripts/autostart.sh was never symlinked or referenced — niri's
spawn-at-startup directives cover everything it launched.

mako/config is gitignored (install.sh generates it from
theme/colors.json) but was still tracked from the initial commit.
The stale ~/.config/mako/config symlink that pointed at the repo
caused install.sh's writes to land back in the repo. Removed both
so install.sh now correctly produces a real generated file in
~/.config/mako/.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

mako/config

@@ -1,5 +0,0 @@
-background-color=#1d1f21
-text-color=#c5c8c6
-border-size=2
-border-color=#81a2be
-default-timeout=4000

scripts/autostart.sh

@@ -1,7 +0,0 @@
-#!/bin/bash
-
-waybar &
-mako &
-swww-daemon &
-nm-applet --indicator &
-polkit-gnome-authentication-agent-1 &