(MAINT) Remove commented out platforms from matrix_from_metadata

Author: david22swan

exe/matrix_from_metadata_v2

@@ -45,7 +45,6 @@ DOCKER_PLATFORMS = {
   'CentOS-8' => 'litmusimage/centos:stream8', # Support officaly moved to Stream8, metadata is being left as is
   'Rocky-8' => 'litmusimage/rockylinux:8',
   'AlmaLinux-8' => 'litmusimage/almalinux:8',
-  # 'Debian-8' => 'litmusimage/debian:8', Removing from testing: https://puppet.com/docs/pe/2021.0/supported_operating_systems.html
   'Debian-9' => 'litmusimage/debian:9',
   'Debian-10' => 'litmusimage/debian:10',
   'Debian-11' => 'litmusimage/debian:11',
@@ -55,8 +54,6 @@ DOCKER_PLATFORMS = {
   'OracleLinux-8' => 'litmusimage/oraclelinux:8',
   'Scientific-6' => 'litmusimage/scientificlinux:6',
   'Scientific-7' => 'litmusimage/scientificlinux:7',
-  # 'Ubuntu-14.04' => 'litmusimage/ubuntu:14.04', Removing from testing: https://puppet.com/docs/pe/2021.0/supported_operating_systems.html
-  # 'Ubuntu-16.04' => 'litmusimage/ubuntu:16.04', Support Dropped
   'Ubuntu-18.04' => 'litmusimage/ubuntu:18.04',
   'Ubuntu-20.04' => 'litmusimage/ubuntu:20.04',
   'Ubuntu-22.04' => 'litmusimage/ubuntu:22.04'