Revert "Fixes #4616 - Add a Fog mixin for looking up EC2 IP addresses"

This reverts commit 97c45d66a0066b6abbf486511aa4f93c67e52007.

Fixes #4616 - Add a Fog mixin for looking up EC2 IP addresses

(cherry picked from commit 4963a970e3ee2a91835f4ab5a493179d96cdeedf)

fixes #3178 - add feature for compute profiles for hostgroups and hosts

fixes #1871, #1879 - add VPC support to EC2 compute resource

Based on patch from Romain Vrignaud <romain@yakaz.com>

fixes #2411 - move lib/audit_extensions lib/fog_extensions lib/foreman to models/concerns

fixes #2739 - add ActiveSupport::Concern syntax to mixins