contrib: remove prettyprint

was introduced by b0447ae long ago

better use the command line tool `jq` for that purpose, it's more
powerful

CHANGELOG.md

@@ -54,6 +54,7 @@
 ### Tools
 
 ### Contrib
+- Remove `prettyprint` script, use `jq` instead (PR#2551 by Sebastian Wagner).
 
 ### Known issues
 

contrib/README.md

@@ -10,7 +10,6 @@ This directory contains contributed scripts which are helpful for maintaining an
 
 * **cron-jobs**: cron job files for pulling in newer versions of supporting databases such as pyasn
 * **logcheck**: logcheck ruleset to filter logs for error messages
-* **prettyprint**: prints the json output for file-output bot prettily
 * **config-backup**: simple Makefile for doing a `make backup` inside of `/opt/intelmq` in order to preserve the latest configurations
 * **logrotate**: an example configuration for *logrotate* (`/etc/logrotate.d/` directory).
 * **check_mk**: Scripts for monitoring an IntelMQ instance with Check_MK.