remove pallet (unmaintained since 2017)

> - repositories at https://github.com/palletops did not receive any commits since 2015-2017
- ref. https://github.com/awesome-foss/awesome-sysadmin/issues/405

README.md

@@ -204,7 +204,6 @@ _Related: [IT Asset Management](#it-asset-management)_
 - [Ansible](http://www.ansible.com/) - Provisioning, configuration management, and application-deployment tool. ([Source Code](https://github.com/ansible/ansible))
 - [CFEngine](https://cfengine.com/) - Configuration management system for automated configuration and maintenance of large-scale computer systems. ([Source Code](https://github.com/cfengine/core))
 - [Chef](https://www.chef.io/chef/) - Configuration management tool using a pure-Ruby, domain-specific language (DSL) for writing system configuration "recipes". ([Source Code](https://github.com/chef/chef))
-- [Pallet](http://palletops.com/) - Infrastructure definition, configuration and management via a Clojure DSL. ([Source Code](https://github.com/palletops))
 - [Puppet](https://puppet.com/) - Software configuration management tool which includes its own declarative language to describe system configuration. ([Source Code](https://github.com/puppetlabs/puppet))
 - [Salt](http://saltstack.com/) - Event-driven IT automation, remote task execution, and configuration management software. ([Source Code](https://github.com/saltstack/salt))