devuan: simplify sngrep install, its in all maintained releases

devuan/resources/sngrep.sh

@@ -18,8 +18,5 @@ if [ ."$cpu_architecture" = ."arm" ]; then
 	cd /usr/src/sngrep && make install
 else
 	#package install
-	echo 'deb http://packages.irontec.com/debian jessie main' > /etc/apt/sources.list.d/sngrep.list
-	wget http://packages.irontec.com/public.key -q -O - | apt-key add -
-	apt-get -q update
 	apt-get -y -q install -y --force-yes sngrep
 fi