Revert "Unit tests for Chef::Audit::AuditEventProxy"

This reverts commit b76a5ed3bc94a9b5a318e6c17db0c73f1d2aef1b.
Revert "Unit tests for audit reporter"

This reverts commit f9266245db4861fa3a73ee043459bf075ccebb96.
Revert "Unit tests for ControlGroupData"

This reverts commit 3b7612f4f08440048112684a4c8a96e50558bd11.