Remove all facter < 2.5 versions from the matrix tests of rubygem-simp-rspec-puppet-facts 3.x.
The 3.0 release of rubygem-simp-rspec-puppet-facts dropped support for all EOL Puppet/Facter versions, including all facter versions below 2.5.
The Travis CI matrix was not updated to remove them, however, which results in the entire matrix besides 2.5 fail
The Travis CI pipelines still pass because these failures are allowed.
A: Facter 2.5 is needed to run spec tests with the gem-installed version of Puppet.
Facter 3.x (aka "cfacter") is not distributed as a native RubyGem that CI systems can install alongside the puppet gems. For this reason, Puppet has maintained the Facter >= 2.5 gem alongside Facter 3.x permit enable testing pipelines to continue using rspec-puppet and puppetlabs_spec_helper to automate spec testing (which requires a ruby facter gem). This requirement will continue until the Facter development is merged in the upcoming cfacter-compiled-as-native-extension Ruby gem facter-ng (which is currently under developed as Facter 4.x).