clean up scripts

.config/polybar/scripts/system-cpu-frequency.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+c=0;t=0
+
+awk '/MHz/ {print $4}' < /proc/cpuinfo | (while read -r i
+do
+    t=$( echo "$t + $i" | bc )
+    c=$((c+1))
+done
+echo "scale=2; $t / $c / 1000" | bc | awk '{print $1" GHz"}')