Remove a bunch of redundant Ansible <2.8 self building checks

roles/matrix-bridge-mx-puppet-discord/tasks/init.yml

@@ -21,10 +21,3 @@
       +
       {{ ["/matrix-mx-puppet-discord-registration.yaml"] }}
   when: matrix_mx_puppet_discord_enabled|bool
-
-# ansible lower than 2.8, does not support docker_image build parameters
-# for self building it is explicitly needed, so we rather fail here
-- name: Fail if running on Ansible lower than 2.8 and trying self building
-  fail:
-    msg: "To self build Puppet Slack image, you should usa ansible 2.8 or higher. E.g. pip contains such packages."
-  when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_mx_puppet_discord_container_image_self_build"