Unify update check script

.config/polybar/scripts/updates-arch-combined.sh.desk

@@ -1,18 +0,0 @@
-#!/bin/sh
-
-# Seems like the network is not up yet when this script is launched
-# for the first time, causing an error. So wait a bit
-sleep 5
-updates_arch=$(/usr/bin/checkupdates | wc -l)
-
-if ! updates_aur=$(trizen -Su --aur --quiet | wc -l); then
-    updates_aur=0
-fi
-
-updates=$(("$updates_arch" + "$updates_aur"))
-
-if [ "$updates" -gt 0 ]; then
-    echo "%{F#dd7777}%{F#ddd} $updates_arch | $updates_aur"
-else
-    echo "%{F#77dd77}%{F#ddd} 0"
-fi