clean scripts, no longer need preamble

build/scripts/utilities.sh

@@ -1,10 +1,5 @@
-#!/bin/bash
-set -e
-source /build/config
-set -x
-
 ## Often used tools
 apt_install_permanent psmisc wget curl python-pip git gawk zip gperf unzip bzip2 inetutils-ping inetutils-telnet rsync
 
 ## Often used python modules
-pip install argparse
+pip install argparse